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Longines 993.1
Ligne: 11.5'''
Jewels: 15
Power Reserve: 29 hrs
Frequency: 18000 vph
Type: Automatic
Period used: 1949-1956
Diameter: 26.2 mm
Height: 6.2 mm
Hands: 1.50 x 0.80 / 0.20 mm
The Longines 993.1 watch movement, produced from 1949 to 1956, was the first automatic movement developed by MST. It incorporated an automatic module into a manual-wind movement. The movement featured various functions, including sub seconds, and came in both sweep seconds and non-sweep seconds variations.
The Longines 993.1 features the following functions:
- Automatic Winding
- Sub Second
- Sweep seconds and non-sweep seconds variations
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 2847 | Ordinary/None | Buy staff |
| 2988 | Incabloc | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.30 x 0.090 x 250 x 8.0 mm | Auto | Buy mainspring | |
| 1.30 x 0.080 x 240 x 7.0 mm | GR3202X | Auto | 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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