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Seiko 4N20-0490
The Seiko 4N20-0490 features the following functions:
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 |
|---|---|---|---|
| BAND, WHITE | 59-70542 | Buy part | |
| CROWN, WHITE | 506-2271 | 8100-2185W | Buy part |
| CRYSTAL X- | 54-48590 | CRY-7328 | Buy part |
| STEM, TAP 10 | 065-327 | 401/1106 | Buy part |
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