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vhjighi

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vhjighi last won the day on February 21 2014

vhjighi had the most liked content!

About vhjighi

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  1. vhjighi

    TANK MC

    My awesome birthday present!!!!!!
  2. vhjighi

    My first ORIS

    It is an affordable mechanical watch.
  3. vhjighi

    PAM 00564

    I have always been the fan of Panerai for many years. Today I went to NewYork to visit a friend of mine, and I purchased a PAM 00564 by the way. It is 8 days winding and 44mm. It has titanium case, sandwish dial and brown strap and so on.
  4. vhjighi

    Friday!!!

    This one today!! (not been off on my wrist for a week), hope you guys a great weekends
  5. A WATCH MEETS THE CHALLENGE OF THE DEEP Fifty years ago Rolex made watchmaking history when it joined the bathyscaphe Trieste, crewed by Swiss oceanographer Jacques Piccard and U.S. Navy Lieutenant Don Walsh, as the Swiss-designed bathyscaphe descended to the then deepest-known point in the ocean. An experimental Rolex Deep Sea Special wristwatch was attached to the exterior of the Trieste when it touched the very bottom of the Mariana Trench on January 23, 1960, reaching a depth of 35,814 feet (10,916 meters). It successfully withstood tremendous pressure that no submersible, let alone watch, had confronted before and that no human could ever survive. The dive marked the culmination of a long association with Jacques Piccard and his father, Auguste Piccard, the inventor of the bathyscaphe, as they stretched the boundaries of deep-sea exploration. It was also the fruit of decades of unrelenting development of the waterproof wristwatch, which was invented by Rolex. A HISTORY OF DISCOVERY Rolex has always been associated with exploration of the planet’s most extreme frontiers and pushing the limits of human endeavor, in keeping with the spirit instilled by its founder, Hans Wilsdorf. He led the company through the most adventurous decades of the 20th century, a period marked by discovery of the world about us and immense technological progress. The Swiss watchmaker has, in particular, nurtured a special relationship with the sea and its deepest reaches from the very beginning. Rolex is simply the natural partner for DEEPSEA CHALLENGE, a scientific expedition that heralds the beginning of a new era in marine exploration. Robust, precise, and highly reliable Rolex Oyster watches have not only accompanied the Trieste on the world’s deepest dive. They also equipped the expedition by Sir John Hunt, Sir Edmund Hillary, and Tenzing Norgay to the top of the world in 1953–leading to the pioneering ascent of Mount Everest–and Chuck Yeager when he broke the sound barrier in 1947. The Piccards, Don Walsh, and their bathyscaphe followed in the steps of those adventurers, providing the ultimate test for Rolex technology and the experimental Deep Sea Special watch during the 1950s. After the Trieste surfaced from its record dive in 1960, a cable was sent to Rolex headquarters: “HAPPY ANNOUNCE TO YOU YOUR WATCH AS PRECISE AT 11,000 METRES AS ON SURFACE. BEST REGARDS JACQUES PICCARD.” INVENTING AND PROVING THE WATERPROOF WRISTWATCH Exploits of the kind have also provided a real-life proving ground for Oyster wristwatches from the very beginning. Rolex is in its element in water, and the name chosen for its iconic collection of waterproof wristwatches is no accident. Waterproofness was a fundamental feature that helped to make the wristwatch reliable and accurate. Rolex invented the first waterproof wristwatch in 1926 and provided a real-life demonstration of its waterproofness when Mercedes Gleitze swam the English Channel wearing one a year later. The Oyster watch innovated with its screw-down case back, bezel, and winding crown, forming the essence of the modern-day sealed case that protects a high-precision movement. Such reliable waterproofness is today inherent in every Rolex Oyster Perpetual model. But Rolex has also sustained and extended its position at the forefront of watchmaking for diving and underwater research with groundbreaking innovations. TOOLS OF THE TRADE During the 1940s and 1950s, developments in diving technology paved the way for a boom in underwater exploration. The exacting professional diving community came to treasure Rolex watches as essential tools of the trade and even helped in their development. • The iconic Oyster Perpetual Submariner, first unveiled in 1953, is today waterproof to a depth of 1,000 feet (300 meters). • The Sea-Dweller model, first presented in 1967, extended the depth limit for Rolex waterproof watches to 2,000 feet (610 meters) then 4,000 feet (1,220 meters) in 1978. • And ultimately the Rolex Deepsea, introduced in 2008, illustrates the supremacy of Rolex in mastering waterproofness. This new-generation divers’ watch is waterproof to a depth of 12,800 feet (3,900 meters), providing a substantial safety margin for those working in the open water at great depth. Each Rolex Deepsea is individually tested in a specially built stainless steel hyperbaric chamber in Geneva. HARNESSING TECHNOLOGY The test tank for the Rolex Deepsea was developed with specialist engineers from COMEX (Compagnie Maritime d’Expertises), a world-renowned French company specializing in underwater engineering and hyperbaric technologies. Rolex has been collaborating with COMEX for decades and supplied Submariner and Sea-Dweller models to equip its elite divers. Timepieces such as the Rolex Deepsea and the state-of-the-art, experimental Rolex DEEPSEA CHALLENGE, carried by James Cameron’s submersible, are the product of nearly a century of finely tuned know-how and innovation. They attest to the pursuit of perfection and the finest engineering. Nonetheless, Rolex’s affinity with the deep does not stop there. It extends to active and sustained sponsorship of renowned marine researchers and ocean exploration, supporting excellence in the advancement of human knowledge.
  6. History of Day-Date Patented July 23. 1955 - officially Released in 1956 after Rolex had been enjoying quite a barren spell in the sale of its manufactured complicated timepieces it soon began to revive fortune. This new 6511 the "Day Date" had a window at 12 spelling out the day at 12 and the date was shown at 3. Due to the complexity of the watch, with its automatic movement, additional day and date discs and a screw down back it was a very large and thick watch which gave it presence on the wrist. Introduced as a niche model it soon gained the popularity it deserves and after the introduction of the concealed clasp ( concealed clasp was offer as $75 option in 1969) it was known as the "President". The Day Date became Rolex's flagship. The first model (6511) lasted just over a year before it was replaced by the externally identical 6611. This model featured the new caliber 1055 movement with its free sprung Micro-Stella balance and was the first to be labeled " Superlative Chronometer Officially Certified" on the dial. This new accuracy standard guaranteed the watch to remain within + 3.0 seconds per day. In 1959 caliber 1055 was replaced with caliber 1555 in model 1803 (18,000bph) and later in year 1965 - model 1803 received caliber 1556 (19,800bph). In 1977 caliber 3055 (quick-set) was introduced in model 18038 and in 1988 caliber 3155 (double quick-set) was introduced in model 18238. Caliber 3155 is the caliber still used today in all Day-Date models. The Day Date earned the nickname the "President" when Rolex reportedly gave one to the then President of the United States Dwight Eisenhower. Some sources say that President Eisenhower was actually given a Datejust (not Day-Date) with the presidential style bracelet. But it is a fact that several other US presidents are known to wear Day-Date (Roosevelt, Kennedy, Johnson, Nixon, Ford, Reagan). These early models did not have the hack feature and appeared rather bulky. In their never ending quest to modernize the basic configuration of the Day Date, Rolex designers have changed from the bulbous bubbleback look of the early models to the slender shape employed today. With only a few mild case design changes over the years the first modification to the Day Date was the addition of the hack feature in about 1972. This allowed the second hand to be stopped dead if you wanted to set the time via a preset accurate source. At this time the shape of the head was essentially the same as it is today. The Day Date was available in white gold, yellow gold, pink gold and platinum although in early 70's the pink gold watch was fazed out. The " Quick set " feature (caliber 3055) solved one of the watches biggest problems. Introduced in the late 1970's Quick set was added to all Rolex models by 1983. Instead of turning the crown round and round to change the date the wearer could just pull the button out half way and a few turns at most and the correct date was displayed. The introduction of the quick set feature also coincided with other developments for the Day Date. The inclusion of the sapphire crystal not only gave the watch a sleeker look but also added to the durability of the watch. The sapphire crystal fitted tighter than the plastic glass employed before and rendered the watch glass scratch proof near enough. The early Day Date models were waterproof to 165 feet ( 50 meters) while the current model is safe at depths of up to 100 meters. At the same time the current model is much slimmer. In addition to the advancements structurally and internally Rolex introduced a new number system that is still in use for today on some models. They added an extra digit to the model number. This number although denoted a new line actually represented the material the watch was when it left the product line. Introduced in 1988/89 was the "Double Quick Set" watch with caliber 3155. This was model 18238 and it made the setting of the Day and Date even easier as they could both be done on the button. Rolex has also increasingly expanded their "Crown Collection" to include all types of precious stones by now although they were available with diamonds on the bezel from their introduction. From the end of 2000 the Day Date has been available in pink gold again. The watch has also been introduced with slightly redesigned case with polished lugs, smooth bezel is now domed, a domed sapphire crystal, solid center links on now heavier bracelet and can also come on an oyster bracelet to bring it in line with many of their other models. The Day Date across the world has become synonymous with class and style. This watch remains one of the most prestigious additions a man can have to his wardrobe. History of DayJust Notable for being the first wristwatch with a date function, the ‘Datejust’ was introduced to market in 1945, shortly after the Second World War. It comprised of a larger version of its Bubbleback and was a self-winding chronograph, using the perpetually powered classic 10-1/2″ Hunter. The original Rolex Datejust, named the Jubilee Datejust model 4467, was only available in 18k gold and this became the flagship model. It features a fine coin edged bezel, a gold edged date window, alternating red/ black date figures, a tiny bubbleback winder and a deeply domed back. This model was a 3 case part Ovettone model though it was soon replaced by a model with only 2 case parts. However the biggest, most dramatic change to the Rolex Datejust came in 1954 with the introduction of the Cyclops lens. Allowing for far easier reading of the date, the Cyclops lens became part of the Rolex signature. Following this development was the creation, in 1957, of a new movement calibre 1065 which was much lighter and slimmer allowing for a flatter back and therefore rendering the old domed back obsolete. In the same year Rolex also released stainless steel versions of the Datejusts, where previously they had only been available in yellow gold (and pink gold in South America). The next change was to change the dial. The old curved edge dial gave way to the new flat dial, which in turn was facilitated by the new Rapid Date Change or quickset feature. The new calibre (3085) movement not only enabled the wearer to change the date much quicker it also meant that there was not as much wear on the hand setting mechanism. Most usefully though it allowed the wearer to change the date from the 28th or 30th to 1st without changing the time. When the manual ” Oysterdate” was introduced in the 1950′s it came in two sizes, one about the same size as an “Air King” and one a little bigger than a Bubbleback. By the Late 1960′s the smaller one was dropped leaving nothing to fill the void between the current Datejust and the Lady’s model. In 1970 this changed however with the introduction of the 2030 movement. This was a scaled down version of the 1030 movement and was immediately fitted to a series of watches universally known as the “Mid Size”. These watches were perfect 80% replicas of the Oyster Perpetual and the Datejust were available in all the metal and dial variations shared by their big brother. They have proved to be one of Rolex’s greatest successes as they were very popular in the Europe, South America and Asia. Because they were an in between size they also appealed to large women or small men to whom the standard sizes did not appeal. At the end of the 1980′s the Datejusts were fitted with the sapphire mineral crystal glass. The purpose of this was two fold. Firstly it was more aesthetically pleasing as it slimmed the look of the Datejust and it also rendered the glass virtually scratch proof, which was extremely practical. The success of the Datejust is phenomenal. From a flagship model when it was first released to one of their entry level models now, it still retains the prowess and exclusiveness that have made it famous.
  7. As we all know that, hairspring functions a crucial role to the whole movement, a watch is accurate or not, what matters most is the hairspring. So to speak, better shock-resistance and tolerance to temperature difference, accuracy of a watch is higher and so does the anti-magnetic. Conventional hairspring used is made from Nivarox which is more inclined to be magnetized and affected by external shocks so to further affect accuracy of a watch. Rolex has always been studied to develop a better material to replace the conventional hairspring, after a long time development, finally the parachrom hairspring is born with much higher anti-magnetic and shock resistance. Rolex claims that movement installed this kind of hairspring is 10 times better shock resistance, parachrom is achieved by using itself inherent features to overcome and offset external impact. Parachrom is an unusual combination of Niobium and Zirconium, these two metals happen to sit right next to each other in the periodic tables, with Niobium having an atomic number of 41, one higher than Zirconium. We may be well-informed of Zirconium because it can be used as a substitute for a diamond, but guess as for Niobium, you may know less, it’s mainly used a constituent in many specialist alloys and steels where it adds both strength and tensile strength. These steels are increasingly used nowadays in the areas of automobile body structure where impact can be expected and the predictable deformation of these alloys is vital. There are almost no uses for the metal Niobium itself and in most steel alloys it is present in almost minute quantities, perhaps one fiftieth of one percent, whilst Rolex use it in the ratio of 85% Niobium to 15% Zirconium. The two metals are fused together in a high vacuum at a temperature of 2400°C, the metals pass through the furnace slowly at 20cm an hour under the intense voltage of 5,000 volts. It passes through the furnace three times before the two metals can be considered to be completely bonded. When the rod is removed from the furnace it reacts with the oxygen in the air and bonds with trace amounts of this atmospheric oxygen and turns blue. Ironically, it turns the same shade of blue as the classic blued steel hairsprings used in Marine Chronometers and other high grade watches of the last century (See the Zenith chronometer balance shown below, almost a hundred years old). The finished rod is around 30 cm (around a foot) long and weighs only 380g (less than a pound); from this rod it is possible to produce 10,000 hairsprings. However; currently, they are experiencing failure rates of between 20 to 30%, so the final result is rather less. The rods are then put through a die press which in subsequent passes turns the initial rod into one 15m long and 2mm diameter and then into one 2 km long (well over a mile) and a diameter of one tenth of a millimetre. The final die forces the metal into a strip 150 microns wide & 45 microns high, which is then cut into strips 22 cm long. There is no form of ‘finishing’ to the hairspring; its final profile is totally dependent on the absolutely perfect profile of the press dies. These are constantly checked between operations with a battery of Leica microscopes to ensure that there has been no change to their profile. The precision of the dies is such that the finished springs vary by no more than one tenth of a micron from the norm; just think about that, without any machining or other finishing they can produce an item accurate to one ten thousandths of a millimetre. If that is a difficult image to conjure, think of it this way, the average human hair is about 100 microns in diameter, the Rolex Parachrom Blu hairspring is finished to an accuracy of one thousandth the diameter of a human hair. Blue hairspring is not blue at first beginning, but the same color as conventional hairsprings, after done the development, it was firstly used on in-house 4130 movement installed on 116520 in 2000, and rolex didn’t pronounce it to public. In 2005, ROLEX introduced another new feature on the PARACHROM hairspring by modifying the structure of its surface. The layer of oxygen present on the surface is transformed and thickened to about 50-100 nm to increase the long term stability of the oscillator even further. This modification of the surface colours the hairspring in blue (colouring by interference). This innovation has been patented. Models used blue parachrom hairspring by Rolex All Daytona’s since 2000 (4130 caliber). New versions of the GMT Master II (released in Gold 2005, Rolesor 2006, Steel 2007) Milgauss (2007) Deep Sea Sea Dweller (2008) Day Date II (2008) Gold Submariner with ceramic bezel (2008) Explorer II with 3186 movement (2008) Milgauss green crystal started to use blue parachrom since 2007
  8. i just want to know what everybody's opinion regarding this question! for me looks and quality is the number one priority when coming down to pick a watch
  9. welcome, you're in the right place to acquire knowledge you're seeking!!
  10. vhjighi

    boxes of PreV

    very good, truly watch fanatics don't leave out anything related to watches,
  11. haha, that's the truth!! at least i'm not alone i do have companions, i think we should start a thread called watches for small wrist!!
  12. that's the most painful part, i like big watches but my wrists don't allow me!!
  13. it's really annoying, especially most of the watches i like are big watches, you people with bigger wrist don't know how much i envy you!!! sorry guys, i need to roar :( :(
  14. thanks for sharing, i like your photography, great pic, admittedly, great threads
  15. i think it depends, for my luxury mechanical watches, daily error should be better from 0-2 seconds on wrist, in this regard, you're really a lucky dog, i have seen many rolexes run daily error around +/-5 seconds, but that's still the normal circumastance. while for cheap mechanical watches, i would expect it with error under 5 seconds would be good i really don't care that much the error on quartz watch which are mainly bought for styles not for accuracy anyway.
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