Compare Studio
105.012 vs 145.022
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| Specification | ||
|---|---|---|
| Production | 1964–1968 | 1968–1988 |
| Era | First 'Professional' | Caliber 861 transition |
| Status | discontinued | discontinued |
| Case diameter | 42mm | 42mm |
| Case material | Stainless steel | Stainless steel |
| Construction | Asymmetric crown-guard case | — |
| Bezel | Tachymeter | Tachymeter (dot-over-90 on early examples) |
| Bezel material | Black aluminium | Black aluminium |
| Crystal | Acrylic (Hesalite) | Acrylic (Hesalite) |
| Caseback type | — | Screw-down solid, engraved |
| Water resistance | 60m | 50m |
| Dial | Black | Black |
| Dial text | First to read 'Professional' | 'Professional'; stepped and flat dial variants |
| Hands | Straight (baton) | Straight (baton) |
| Lume | Tritium | Tritium |
| Lume type | Tritium | Tritium |
| Movement | Manual chronograph | Manual chronograph |
| Caliber | 321 | 861 |
| Manufacturer | Omega (Lemania base) | Omega (Lemania base) |
| Winding | manual | manual |
| Power reserve | — | ~48 hours |
| Frequency | — | 21,600 vph |
| Jewels | — | 17 |
| Complications | Chronograph, tachymeter | Chronograph, tachymeter |
| Functions | — | Chronograph, tachymeter |
Compare 105.012 with another generation