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CK2998 vs 311.30.42.30.01.005
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| Specification | ||
|---|---|---|
| Production | 1959–1962 | 2014–2021 |
| Era | First in space | Caliber 1861 (final) |
| Status | discontinued | discontinued |
| Case diameter | 40mm | 42mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Tachymeter | Tachymeter |
| Bezel material | Black aluminium | Black aluminium |
| Crystal | Acrylic (Hesalite) | Acrylic (Hesalite) |
| Water resistance | 60m | 50m |
| Dial | Black | Black |
| Hands | Alpha hands | Straight (baton) |
| Lume | Tritium | Super-LumiNova |
| Lume type | Tritium | Super-LumiNova |
| Movement | Manual chronograph | Manual chronograph |
| Caliber | 321 | 1861 |
| Manufacturer | Omega (Lemania base) | Omega (Lemania base) |
| Winding | manual | manual |
| Complications | Chronograph, tachymeter | Chronograph, tachymeter |
| Bracelet | — | Steel |
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