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3590.50 vs CK2998
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| Specification | ||
|---|---|---|
| Production | 1988–1996 | 1959–1962 |
| Era | Caliber 861 | First in space |
| Status | discontinued | discontinued |
| Case diameter | 42mm | 40mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Tachymeter | Tachymeter |
| Bezel material | Black aluminium | Black aluminium |
| Crystal | Acrylic (Hesalite) | Acrylic (Hesalite) |
| Water resistance | 50m | 60m |
| Dial | Black | Black |
| Hands | Straight (baton) | Alpha hands |
| Lume | Tritium then Super-LumiNova | Tritium |
| Lume type | — | Tritium |
| Movement | Manual chronograph | Manual chronograph |
| Caliber | 861 | 321 |
| Manufacturer | Omega (Lemania base) | Omega (Lemania base) |
| Winding | manual | manual |
| Complications | Chronograph, tachymeter | Chronograph, tachymeter |
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