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ETA 2791
Ligne: 11.5'''
Jewels: 20
Power Reserve: 43 hrs
Frequency: 21600 vph
Type: Automatic
Period used: ~1975
Diameter: 26 mm
Height: 5.7 mm
Hands: 1.50 x 0.90 x 0.21 mm
The ETA 2791 watch movement features a ball-bearing rotor and a sophisticated excenter self-winding mechanism with just one gear stage. This movement incorporates the "magic lever" principle, which was first used in Seiko automatics around 1970 and was also present in the early Otero automatics from the 1950s. The automatic module is assembled using only two screws. While there are slight variations in the mainsprings among the Otero 800 through 907 generations, these differences are not significant. The ETA 2791 movement offers automatic winding, sweep seconds, and a quickset date function. It was primarily utilized around 1975.
The ETA 2791 features the following functions:
- Automatic Winding
- Date: quickset
- Sweep second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
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Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.20 x 0.105 x 9.5 mm | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
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| See More |
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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