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Elgin 730A
Jewels: 17
Power Reserve: 34 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1916
Diameter: 43.1 mm
Height: 6.65 mm
Hands: 1.65 x 0.92 / 0.25 mm
The Elgin 730A mechanical watch movement, also known as the open face calibre, model 7, was produced in 1911 with a total of 1000 units. It features a bimetallic screw balance and a Breguet hairspring. The movement incorporates a negative stem mechanism, allowing for the switching between winding and setting with the stem in the lever position. The escapement of the Elgin 730A has been modified compared to models like 210, offering improved functionality. Additionally, this movement includes stem wind capabilities with switching available via the crown or lever. It also features a sub-second dial. The Elgin 730A movement was commonly used around the period of 1916.
The Elgin 730A features the following functions:
- Stem wind, switching by crown or lever
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
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Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 2.64 x 0.190 x 560 x 16.0 mm | 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) |
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Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
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