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Elgin 312
Jewels: 7
Power Reserve: 33 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: 1903-1928
Diameter: 45.75 mm
Height: 10.0 mm
Hands: 2.46 x 1.27 / 0.30 mm
The Elgin 312 watch movement was produced from 1903 to 1928, with a total production of 531,800 units. This open face calibre, model 5 movement features a bimetallic screw balance and a Breguet hairspring. Notably, it incorporates a ratchet under the base plate and a negative stem mechanism with a rocker bar. The functions of this movement include stem wind, which can be switched by either the crown or lever, as well as a sub second feature.
The Elgin 312 features the following functions:
- Stem wind, switchable by crown or lever
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 2.90 x 0.220 x 540 x 18.0 mm | GR71211DBH | DBH | 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 |
|---|---|---|---|
| CENTER STAFF | 2357/ELG | 2357/ELG | Buy part |
| MAINSPRING 2.90-.21-572 DB | MSN-404 (use MS-JA102) | MSN-404 | Buy part |
| MAINSPRING 2.90-.22-540 18 | MS-JA101 | GR 7121-1-DBH | Buy part |
| MAINSPRING 20-1.5-22.5 DB | MSN-403 | MSN-403 | Buy part |
| SCREW, CASE | 903/ELG | 903/ELG | Buy part |
| STAFF, (SHORT) HUB 18S P12 | 22BB/5 | 22BB/5 | Buy part |
| STAFF, LNG HUB 18S P12 REG | 22BB/4 | 22BB/4 | Buy part |
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