Switzerland| Brand | Louis Erard | 
|---|---|
| Collection | 1931 | 
| Model | 51201AA21.BDT01 | 
| Gender/Type | Men | 
| Watch Style | Classic, Luxury | 
| Movement | Mechanical hand wind | 
| Caliber mechanism | ETA Peseux 7001 ER 1001 | 
| Impermeability | 50 M (165 Foot) | 
| Width | 40 | 
| Thickness | 9 | 
| Case | Stainless steel | 
| Case Colour | Steel | 
| Glass | Anti-reflective sapphire | 
| Clock Face | Arabic numerals, Indices | 
| Dial Colour | White | 
| Strap/Bracelet Material | Leather | 
| Strap/Bracelet Colour | Brown | 
| Features | Transparent case back |