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Seiko 7421-002S
The Seiko 7421-002S watch movement incorporates an alarm function, sweep seconds functionality, and is specifically designed for clocks. Additionally, it includes a calendar feature.
The Seiko 7421-002S features the following functions:
- Alarm Complication
- Calendar
- Sweep Seconds
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
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| BALANCE COMPLETE | 721/2161 | Buy part |
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