| Manufacturer | Longines |
| Caliber Number | L263 |
| Base Caliber | ETA 955.412 |
| Dimensions | 10 1/2”’ (23.3mm) x 2.50mm thick |
| Battery Cell Number | 371 (or 395) |
| Stem | 401-906, tap 10 |
| Hand Sizes | 120, 70, 20 |
| Jewels | 7 |
| Functions | Hours, minutes, central seconds, date at 3:00, end of battery indicator |
| Country of Manufacture | Switzerland |
| Known Models | Hydo Conquest |
ETA caliber 955.412 replacement prices were found ranging from $18.99 – $36.95.