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Seiko 4M21A
Ligne: 11.5'''
Jewels: 7
Frequency: 32768 hz
Type: Quartz
Period used: 1985-1988
Diameter: 25.6 mm
Height: 2.5 mm
Hands: 1.20 x 0.70 x 0.20 mm
The Seiko 4M21A is an 11½’’’ quartz movement, which was used during the period of 1985-1988. It features a quartz-controlled stepper motor and an analog display, showing central hours, minutes, and seconds. The watch movement also includes a quickset date function, with the date positioned at either 3:00 or 6:00. Additionally, it offers a stop seconds function and a sweep seconds hand.
The Seiko 4M21A features the following functions:
- Analog Display
- Calendar
- Central hours, minutes, and seconds
- Date at 3:00 or 6:00
- Date: quickset
- Quartz controlled stepper motor
- Stop Seconds Function
- Sweep second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
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Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
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Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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Documents
Parts Listing
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