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Seiko 8420-7690
Base: Seiko 8420A
The Seiko 8420-7690 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 |
|---|---|---|---|
| CENTER WHEEL | 0221815 | 201/1157 | Buy part |
| CENTER WHEEL BRDG W/POST 8420 | 0122815 | Buy part | |
| CROWN-GOLD | 25M02NE3 | Buy part | |
| CRYSTAL X- | ES4N66SN00 | Buy part | |
| FOURTH WHEEL, W/SECOND | 0241815 | 224/673 | Buy part |
| GASKET, CASEBACK G-CB | 0G1900N01 | G283-614 | Buy part |
| GASKET, CROWN OR STEM | DZ0041B01 | G283-812 | Buy part |
| HOUR WHEEL, HT=.80MM | 0271815 | 250/1640 | Buy part |
| SET LEVER | 0383815 | 443/1676 | Buy part |
| STEM, TAP 13 | 0354815 | 401/968 | Buy part |
| TRAIN WHEEL BRIDGE 8420A | 0125815 | Buy part |
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