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Unitas 490
Ligne: 5.75 x 8.5'''
Jewels: 15
Power Reserve: 45 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1950
Size: 12.8 x 19.5 mm
Height: 3.6 mm
Hands: 1.20 x 0.60 mm
The Unitas 490 watch movement shares many common parts with the Eterna 1057 movement. It is difficult to determine the specific differences between the ETA 761-764, 773, 838-841, 846, 862, 882, 1030, and 1040, as these numbers likely refer to the various available base plates, bridge layouts, and lever bridges. The Unitas 490 movement is a manual wind movement that was used during approximately the 1950s.
The Unitas 490 features the following functions:
- Manual Winding
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.30 x 0.080 x 280 x 8.0 mm | GR3204 | Manual | Buy mainspring |
| 1.30 x 0.080 x 260 x 7.5 mm | GR3203 | 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
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