Detail
| Model | Oyster Speedking Ref.6420 |
| Product number | 6420 |
| Year of manufacture | 1st Quarter 1963 (Sir.294xxx) |
| Movement | Manual winding (Cal.1210) |
| Country of manufacture | Switzerland |
| Waterproof | Daily life waterproof |
| Case diameter | 31mm |
| Material | Stainless steel |
| Crystal material | plastic |
| Strap width | 17mm |
| Buckle width | 13mm |