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- Omega Cal. 240 - Click spring 1105

| Brand | Omega |
|---|---|
| Calibre | Ω 240 |
| International reference | 1105 |
| Compatibility | 241-242-243-244-245-250-252 |
| State | Never used |
| Year of production | 1938-1959 |
| Caliber diameter | 13.5 x 17.5 mm |
| Caliber height | 3.25 mm |
| Frequency | 21'600 A/h |
| Lift | 52° |
| Power reserve | 48h |
| Ruby | 15 |