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Unitas 498
Ligne: 9.75'''
Jewels: 15
Power Reserve: 47 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1940
Diameter: 21.7 mm
Height: 3.65 mm
Hands: 1.30 x 0.70 / 0.22 mm
Base: Eterna 905
The Unitas 498 watch movement, introduced around 1940, is a manual wind movement with sub seconds. Although it shares similarities with the Eterna 905 movement, the specific differences between these two movements are not known.
The Unitas 498 features the following functions:
- Manual Winding
- Sub Second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.60 x 0.100 x 300 x 9.0 mm | GR4486 | Manual | Buy mainspring |
| 1.60 x 0.085 x 280 x 8.0 mm | GR4456 | Manual | Buy mainspring |
| 1.55 x 0.100 x 290 x 9.0 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 |
|---|---|---|---|
| MAINSPRING 1.60-.10-300 9 | MS-711K | GR 4486 | Buy part |
| STAFF, INCA 50 HSP | 100/1405 | Buy part | |
| STEM, O/S TAP 10 1.5=HUB | 200/304F | Buy part |
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