| Model | Must Tank SM |
| Reference | 1613 |
| Year of Production | 1990's |
| Movement | Quartz (battery operated) |
| Country of Origin | Switzerland |
| Water Resistance | non-waterproof |
| Case Diameter | 28mm×21mm |
| Case Material | Verlmail |
| Crystal | mineral glass |
| Lug Width | 15mm |
| Buckle Width | 14mm |