1.45 x .11 x 320 x 10 Automatic
GR3983XAdditional Information
| Swiss Part Description | 1208, 20.100, 20.102, 20100, 20102, 770, 771, 7770, 7771, 7772, MainSpring, Mainsprings |
| Mainspring Height | 1.45 |
| Mainspring Thickness (Strength) | .11, 0.11 |
| Mainspring Length | 320 |
| Mainspring Barrel Diameter | 10 |
| Mainspring Type | Auto |
| Alpina Calibre Number | 664 |
| Certina Calibre Number | 25.072, 25.0721, 25.0723 |
| Felsa Calibre Number | 410, 415 |
| Helvetia Calibre Number | 836, 837, 838, 841 |
| Marvin Calibre Number | 762, 795 |
