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ETA 821
Ligne: 18'''
Jewels: 15
Power Reserve: 47 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1931
Diameter: 40.6 mm
Height: 5.3 mm
Hands: 1.90 x 1.20 / 0.30 mm
The ETA 821 watch movement is an open face calibre with a bimetallic screw balance that features four adjustment screws. It is equipped with a Breguet hairspring. There are only minor differences between the Eterna 403 and ETA 821 movements. The ETA 821 movement offers stem wind and set functions, as well as sub seconds. It was produced around 1931.
The ETA 821 features the following functions:
- Stem wind and set
- Sub Second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.90 x 0.200 x 480 x 16.5 mm | GR5660 | Manual | Buy mainspring |
| 1.90 x 0.200 x 460 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) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|
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