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Ravenna

Seiko movement

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4S12: hour, minute, second and 24 - hour hands

 

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4S15/25/35: 25 jewels, date, manual winding/second hand stops (high beat movement)

 

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4S24: 21 jewels, manual winding/second hand stops (LAUREL line adopted this movement in 1990s)

 

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4S27/77: 28 jewels, date /date, 24 hour indicator, manual winding/hacking seconds (pointer calendar/retrograde date)

 

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4S28: 24 jewels, manual winding, small second hand/hacking seconds (LAUREL line adopted this movement in 1990s)

 

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4S29: 29 jewels, manual winding, small second hand/hacking seconds, power reserve display. ( used in Brightz line)

 

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6S28: 34 jewels, 1/8 sec timing, 30/12 cumulative time, date, manual winding /hacking seconds, (automatic winding chronograph movement/column wheel)

 

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7S25: 21 jewels, date (used in dress watches)

 

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7S26: 21 jewels, date /day, (used in Seiko 5, S-WAVE)

 

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7S35: 23 jewels, date(the rotor engraved with special lettering/used in dress watches)

 

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7S36: 23 jewels, date /day, (used in Superior Seiko 5 and Sports watches)

 

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7S55: 23 jewels, date.(used in Superior SLX line)

 

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8L35: 26 jewels, date, manual winding/hacking seconds (shock resistant, used in expensive  diving watch)

 

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9S51: 24 jewels, new GS standard, manual winding/hacking seconds (high beat movement/used  in GS)

 

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9S54: 20 jewels, manual winding/hacking seconds, new GS standard (used in GS manual winding)

 

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9S55: 26 jewels, date, new GS standard, manual winding/hacking seconds (high beat  movement/used in GS)

 

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9S56: 27 jewels, date, GMT hand, new GS standard, manual winding/hacking seconds (used in  GS GMT)

 

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6R15: 23 jewels, date, 50 hours power reserve, manual winding/hacking seconds(used in spirit line)

 

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4L25: 25 jewels, date, 42 hours power reserve, manual winding/hacking seconds (used in Mechanical line)

 

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4206: 17 jewels, date/day, manual winding (used in Seiko 5 ladies watch)

 

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4207: 21 jewels, date/day, manual winding (used in Seiko 5 ladies watch)

 

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4227: 21 jewels, date/day, manual winding (used in Seiko 5)

 

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4225: 21 jewels, date (used in boy size Seiko 5), I cannot find the movement picture. This SNH029 adopted 4225 movement.

 

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6870: 21 jewels, manual winding. (based on 6810/two-hand ultra-thin movement/used in dress line)

 

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6898: 22 jewels, manual winding (thickness: 2mm, two-hand ultra-thin movement/used in dress line)

 

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7R88: 30 jewels, manual winding/hacking seconds, the second hand continues moving, date, power reserve display (±15s/used in CREDOR Spring Drive)

 

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9R65: 30 jewels, the second hand continues moving, date, power reserve display, manual winding/hacking seconds (±15 a month/used in GS Spring Drive)

 

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9R66: 30 jewels, automatic winding Spring Drive, diameter: 30mm, thickness: 5.8mm, 72 hours power reserve, GMT, power reserve display, GS standard.

 

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5R66: 30 jewels, automatic winding Spring Drive, diameter: 30mm, thickness: 5.8mm, 72 hours power reserve, GMT, power reserve display, GS standard

 

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7R89: 30 jewels, automatic winding Spring Drive, diameter: 29.0mm, thickness: 4.5mm, 48 hours power reserve, moonphase, power reserve display

 

 

 

4S76: 31 jewels, automatic winding Spring Drive, diameter: 26.0mm, thickness: 5.3mm, 50 hours power reserve, day, power reserve display.

 

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6R20: 29 jewels, automatic winding Spring Drive, diameter: 27.4mm, thickness: 6.15mm, 45hours power reserve, day, power reserve display.

 

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9S67: 41 jewels, automatic winding (manual winding), diameter: 28.4mm, thickness: 5.9mm, 72 hours power reserve, day, power reserve display.

 

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5R77: 30 jewels, automatic winding Spring Drive, diameter: 30mm, thickness: 6.0mm, 72 hours power reserve, moonphase, power reserve display.

 

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5R65: 30 jewels, manual winding Spring Drive, diameter: 30mm, thickness: 5.1mm, 72 hours power reserve, date, day, power reserve display.

 

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