Louis Erard DayDateMoon
| Brand | Louis Erard |
| Name | DayDateMoon |
| Reference | 37 204 AA 21 |
| Diameter | 40 mm |
| Material | Stainless Steel Case, Leather Strap |
| Features | Date, Date Pointer, Day of the Week, Month, Moonphase, Central Seconds Hand, Water resistant to 100 ft |
| Movement | Automatic Self-Winding Mechanical |
