| Model | Must Tank LM Opaline New Old Stock |
| Reference | 590005 |
| Year of Production | 1990's |
| Movement | Quartz (battery operated Cal.90) |
| Country of Origin | Switzerland |
| Water Resistance | non-waterproof |
| Case Diameter | 30mm×23mm |
| Case Material | Verlmail |
| Crystal | mineral glass |
| Lug Width | 17mm |
| Buckle Width | 16mm |