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310.30.42.50.01.001 vs CK2915
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| Specification | ||
|---|---|---|
| Nickname | — | Broad Arrow |
| Production | 2021–present | 1957–1959 |
| Era | Caliber 3861 (sapphire) | First Speedmaster |
| Status | current | discontinued |
| MSRP | $7,600 (2023, sapphire sandwich) | — |
| Case diameter | 42mm | 39mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Tachymeter | Tachymeter |
| Bezel material | Black aluminium (anodised) | Steel (later aluminium) |
| Crystal | Sapphire (sapphire caseback) | Acrylic (Hesalite) |
| Caseback type | Display (sapphire) | Screw-down solid |
| Water resistance | 50m | 60m |
| Dial | Black (step dial) | Black |
| Hour markers | Applied Omega logo | — |
| Hands | Straight (baton) | Broad arrow |
| Lume | Super-LumiNova | Radium then tritium |
| Lume type | Super-LumiNova | Radium |
| Movement | Manual chronograph | Manual chronograph |
| Caliber | 3861 | 321 |
| Manufacturer | Omega | Omega (Lemania base) |
| Winding | manual | manual |
| Power reserve | ~50 hours | — |
| Frequency | 21,600 vph | 18,000 vph |
| Complications | Chronograph, tachymeter | Chronograph, tachymeter |
| Functions | Chronograph, tachymeter | Chronograph, tachymeter |
Compare 310.30.42.50.01.001 with another generation