Switzerland| Brand | Louis Erard |
|---|---|
| Collection | 1931 |
| Model | 31218 AA11.BDC21 |
| Gender/Type | Men |
| Watch Style | Classic, Luxury |
| Movement | Automatic self-wind |
| Caliber mechanism | ETA 2824 |
| Impermeability | 30 M (99 Foot) |
| Width | 42 |
| Case | Stainless steel |
| Case Colour | Steel |
| Glass | Anti-reflective sapphire |
| Clock Face | Arabic numerals, Indices |
| Dial Colour | Silvery |
| Strap/Bracelet Material | Leather |
| Strap/Bracelet Colour | Brown |
| Functions | Date, Month, Moon phase, Week day |
| Features | Transparent case back |