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Seiko 8A21A
Lift Angle: 43°
The Seiko 8A21A features the following functions:
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.50 x 0.100 x 300 x 9.0 mm | GR4122 | Manual | Buy mainspring |
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 |
|---|---|---|---|
| BARREL | 182/771 | /BET 1553 | Buy part |
| BARREL ARBOR | 195/1127 | Buy part | |
| CENTER WHEEL, SS | 206/26 | Buy part | |
| CROWN WHEEL | 420/1226 | 421/BET 8021-68 | Buy part |
| JEWEL, LOWER BALANCE CAP | 330/178 | 7901/MST | Buy part |
| JEWEL, UPPER BALANCE CAP | 311/180 | Buy part | |
| MAINSPRING 1.50-.10-300 9 | MS-611K | GR 4122 | Buy part |
| MINUTE WHEEL | 260/1060 | /BET 8025 | Buy part |
| PALLET FORK & ARBOR | 710/1120 | 797/BET 1197N | Buy part |
| RATCHET WHEEL | 415/58 | 416/AS 1237-123 | Buy part |
| ROCKING BAR | 437/10 | /BET 8027 | Buy part |
| SCREW, SET LEVER | 5443/1268 | Buy part | |
| SET LEVER | 443/1205 | Buy part | |
| SET SPRING | 440/852 | 439/BET 8020N | Buy part |
| SET WHEEL | 450/496 | 451/452/AS 1237 | Buy part |
| STAFF, ROLLER | 100/1659 | Buy part | |
| STEM, T6 | 200/59F | Buy part | |
| STEM,T10-SQ TOO SMALL | 200/142F | Buy part | |
| THIRD WHEEL | 210/1334 | /BET 8021-68 | Buy part |
| WINDING PINION | 410/81 | 411/BET 1443 | Buy part |
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