| Model | Oyster Speedking Ref.6420 |
| Reference | 6420 |
| Year of Production | 1st Quarter 1963 (Sir.294xxx) |
| Movement | Manual winding (Cal.1210) |
| Country of Origin | Switzerland |
| Water Resistance | Daily life waterproof |
| Case Diameter | 31mm |
| Case Material | Stainless steel |
| Crystal | plastic |
| Lug Width | 17mm |
| Buckle Width | 13mm |