Compare Studio
145.022 vs CK2915
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| Specification | ||
|---|---|---|
| Nickname | — | Broad Arrow |
| Production | 1968–1988 | 1957–1959 |
| Era | Caliber 861 transition | First Speedmaster |
| Status | discontinued | discontinued |
| Case diameter | 42mm | 39mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Tachymeter (dot-over-90 on early examples) | Tachymeter |
| Bezel material | Black aluminium | Steel (later aluminium) |
| Crystal | Acrylic (Hesalite) | Acrylic (Hesalite) |
| Caseback type | Screw-down solid, engraved | Screw-down solid |
| Water resistance | 50m | 60m |
| Dial | Black | Black |
| Dial text | 'Professional'; stepped and flat dial variants | — |
| Hands | Straight (baton) | Broad arrow |
| Lume | Tritium | Radium then tritium |
| Lume type | Tritium | Radium |
| Movement | Manual chronograph | Manual chronograph |
| Caliber | 861 | 321 |
| Manufacturer | Omega (Lemania base) | Omega (Lemania base) |
| Winding | manual | manual |
| Power reserve | ~48 hours | — |
| Frequency | 21,600 vph | 18,000 vph |
| Jewels | 17 | — |
| Complications | Chronograph, tachymeter | Chronograph, tachymeter |
| Functions | Chronograph, tachymeter | Chronograph, tachymeter |
Compare 145.022 with another generation