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Balance Staff
For Seiko 8420-7340
Ronda #993
Movement Listing
This balance staff is used by the following movements:
| Movement | Shock System | Description |
|---|---|---|
| Hamilton 31 | Ordinary/None | 18000 BPH SHOCK ADJ STUD HOLD |
| Hamilton 31 | Ordinary/None | 18000 BPH SHOCK ADJ STUD HOLD |
| Kienzle 48 | Ordinary/None | |
| Zenith 1740 | Ordinary/None | 21,600 BPH W/O SEC ULTRAFLEX |
| Citizen 4-S16946 | Ordinary/None | CITIZE CASE REFERENCE |
| Rolex 374 | Ordinary/None | |
| Seiko 7006-8040 | Ordinary/None | SEIKO CASE REFERENCE |
| Omega 16143 | Ordinary/None | OMEGA CASE - USES CALIBER 440 |
| Caravelle 6OB | Ordinary/None | 21,600 BPH 17JWL SHOCK RESISTANT |
| Citizen 4-221826 | Ordinary/None | CITIZE CASE REFERENCE |
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