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Longines 18.90M
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 Longines 18.90M watch movement shares many parts in common with the Eterna 1057 movement. The specific differences between the 761-764, 773, 838-841, 846, 862, 882, 1030, and 1040 movements are currently unknown. It is likely that these numbers are assigned to denote variances in the base plates, bridge layouts, and lever bridges. The Longines 18.90M movement is a manual wind movement that was used during the period around 1950.
The Longines 18.90M 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
| Part Description | Reference # | Alternate | Buy |
|---|
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