| Model | Must Tank LM Black Roman Manualwind |
| Reference | 6 |
| Year of Production | 1980's |
| Movement | Manual winding (Cal.78-1) |
| Country of Origin | Switzerland |
| Water Resistance | non-waterproof |
| Case Diameter | 30mm×23mm |
| Case Material | Vermeil |
| Crystal | mineral glass |
| Lug Width | 17mm |
| Buckle Width | 14mm |