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- Tissot Cal. 15.3 - Full Balance 721

| Brand | Tissot |
|---|---|
| Calibre | Tissot 15.3 |
| International reference | 721 |
| Compatibility | Tissot 15.3, Tissot 15.3-2 |
| State | Never used |
| Year of production | Circa 1947 |
| Caliber diameter | 15.3 mm x 18 mm |
| Caliber height | 3.25 mm |
| Frequency | 21'600 A/h |
| Power reserve | 34h |
| Ruby | 15 |