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Specs, dimensions and prices at a glance.
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| Spec |  Speedmaster ProfessionalFind on eBay |  Chronomaster SportFind on eBay |
|---|---|---|
Fits my wrist | — | — |
| Brand | Omega | Zenith |
| Collection | Speedmaster | Chronomaster |
| Price | $6,400 | $11,800 |
| Case material | Stainless steel | Stainless steel |
| Case diameter | 42 mm | 41 mm |
| Case thickness | 13.58 mm | 13.6 mm |
| Lug width | 20 mm | 20 mm |
| Lug-to-lug | 47.5 mm | 46.8 mm |
| Movement | Manual wind | Automatic |
| Caliber | 3861 → | El Primero 3600 → |
| Water resistance | 50 m | 100 m |
| Screw-down crown | No | — |
| Power reserve | 50 hours | 60 hours |
| Jewels | 26 | — |
| Weight | 89 g | — |
| Antimagnetism | 15,000 gauss | — |
| Release year | 1969 | 2021 |
| Country of origin | Switzerland | Switzerland |
