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Laco 550
Jewels: 7
Power Reserve: 34 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: 1898-1903
Diameter: 43.1 mm
Height: 6.65 mm
Hands: 1.65 x 0.92 / 0.25 mm
The Laco 550 watch movement, produced from 1898-1903, is an open face caliber, model 7, with a bimetallic screw balance and Breguet hairspring. It incorporates a negative stem mechanism and allows for switching between winding and setting in the lever position. This pocket watch movement features stem wind, with the ability to switch by crown or lever, and has a sub-second function.
The Laco 550 features the following functions:
- Pocket Watch
- Stem wind, switching by crown or lever
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 2.60 x 0.205 x 540 x 17.0 mm | GR6806DBH | DBH | Buy mainspring |
| 2.60 x 0.200 x 540 x 17.0 mm | DBH | 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 17.5-4.5-21.5 DBH | MS-JA104 | GR 6781-DBH | Buy part |
| MAINSPRING 2.60-.20-540 17 | MS-JA105 | GR 6801-DBH | Buy part |
| MAINSPRING 2.60-.205-540 17 | MS-JA106 | GR 6806-DBH | Buy part |
| STAFF, NEW .63 ROLLER 5.33 OA | 22BB/7 | 861/ELG P11 | Buy part |
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