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44-9990 vs SJE083
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| Specification | ||
|---|---|---|
| Nickname | 44KS | — |
| Production | 1964–1968 | 2022–present |
| Era | 44KS — Daini manual-wind | Modern King Seiko revival |
| Status | discontinued | current |
| Case diameter | 36.5mm | 38.6mm |
| Thickness | — | 10.7mm |
| Case material | Stainless steel | Stainless steel |
| Case finish | — | Flat-polished (Zaratsu) surfaces with hairline finishing |
| Construction | Faceted case with sharp, flat-polished surfaces | — |
| Crystal | Acrylic | Sapphire, dual-curved |
| Crown | Push-pull crown at 3 | 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 | Applied faceted markers |
| Hands | Faceted dauphine | Faceted dauphine |
| Movement | Manual wind | Automatic |
| Caliber | 4420A | 6L35 |
| Manufacturer | Seiko (Daini Seikosha) | Seiko |
| Winding | manual | automatic |
| Power reserve | — | ~45 hours |
| Frequency | 18,000 vph | 28,800 vph |
| Jewels | 25 | — |
| Complications | — | Centre seconds |
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