| Model | King Seiko 2nd Chronometer |
| Reference | 4420-9990 |
| Year of Production | January 1966 |
| Movement | Manual winding (Cal. 4420A not specified) |
| Country of Origin | Japan |
| Water Resistance | Daily life waterproof |
| Case Diameter | 37mm |
| Case Material | Stainless steel |
| Crystal | plastic |
| Lug Width | 18mm |
| Buckle Width | 15mm |