Compare Studio
44-9990 vs 5626-7000
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| Specification | ||
|---|---|---|
| Nickname | 44KS | 56KS |
| Production | 1964–1968 | 1968–1975 |
| Era | 44KS — Daini manual-wind | 56KS — Suwa automatic |
| Status | discontinued | discontinued |
| Case diameter | 36.5mm | 36mm |
| Case material | Stainless steel | Stainless steel |
| Construction | Faceted case with sharp, flat-polished surfaces | — |
| Crystal | Acrylic | Acrylic |
| Crown | Push-pull crown at 3 | — |
| Caseback | Screw-down, carrying the Daini lightning-bolt mark | — |
| Dial | Silver | Silver |
| Dial text | KING SEIKO / CHRONOMETER on some executions | — |
| Hour markers | Applied faceted markers | — |
| Hands | Faceted dauphine | — |
| Movement | Manual wind | Automatic |
| Caliber | 4420A | 5626A |
| Manufacturer | Seiko (Daini Seikosha) | Seiko (Suwa Seikosha) |
| Winding | manual | automatic |
| Frequency | 18,000 vph | 28,800 vph |
| Jewels | 25 | 25 |
| Complications | — | Day-date, quickset |
Compare 44-9990 with another generation