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Seiko 5S21-7A30
The Seiko 5S21-7A30 watch movement is a pocket watch movement.
The Seiko 5S21-7A30 features the following functions:
- Pocket Watch
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| MAINSPRING 30-5-25.5 HOOK | 1956/ELG | Buy part | |
| MAINSPRING, 30 X 5 X 25-1/2 | (use MSN-407) | 1956/ELG .007 | Buy part |
| MAINSPRING, 30 X 5 X 25-1/2 | MSN-407 | MSN-407 | Buy part |
| STAFF, 18S DR 3/4 PLATE | 1901C/ELG P13 | 22BB/2 | Buy part |
| STAFF, 18S DR 3/4 PLATE | 22BB/2 | 1901/ELG | Buy part |
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