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Laco 550
Basic Information
| Name | Laco 550 |
|---|---|
| Alternative Name | Durowe 7.75x11''' |
| Base Calibre | Durowe 7.75x11" |
| Manufacturer | Laco |
| Launch Year | 1940 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 7.75 ‴ x 11 ‴ |
|---|---|
| Dimensions | 17.55 mm x 25.05 mm |
| Height | 3.5 mm |
| Further Measures | Mounting Diameter (Dm): 17.55 x 25.05mm Stem height (T): 1.6mm Mounting Height (F): 0.5mm |
| Power Reserve | 42 hours |
| Frequency | 18,000 vph |
| Jewels | 17 |
Complications and Specifications
| Shape | Barrel (Tonneau) |
|---|---|
| Complications |
|
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Manual |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Stem Winding (Crown) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.20 x 0.71 / 0.18mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | (not set) |
| Notes | Remarks: 1940-1958 option: threads for dust protection frame (Fig.3) Other data: balance staff: U349 stem: W311 mainspring / battery: Zf692, 1.20 x 9.5 x 0.12 x 270mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 15, 17 |
| Signature | 1-2) ca. 1945: - D (Durowe) (Durowe 7.75x11" ) 3-4) ca. 1945: Ormo - D (Durowe) (Durowe 7.75x11" ) |
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:52 AM |
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