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Seiko 21DAY
The Seiko 21DAY watch movement features sweep seconds functionality, which allows for continuous and precise measurement of time.
The Seiko 21DAY features the following functions:
- Sweep Seconds
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 2947 | Ordinary/None | Buy staff |
| 3721 | Incabloc | Buy staff |
| 3192 | Supershock | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.60 x 0.080 x 260 x 7.0 mm | GR4446 | Manual | Buy mainspring |
| 1.60 x 0.080 x 240 x 7.0 mm | GR4445 | Manual | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
|---|---|---|---|
| See More |
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
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