Omega Speedmaster Movements: 1861 vs. 1863 - Bob's Watches
Omega Speedmaster chronograph steel manual winding Kal. 1863 Ref. 311.30.42.30.01.006 | 2207444
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![Omega Speedmaster] Calibre 1863 : r/Watches](https://i.redd.it/wt1whublsc531.jpg "Omega Speedmaster] Calibre 1863 : r/Watches")
Omega Speedmaster] Calibre 1863 : r/Watches
Omega Speedmaster Movements: 1861 vs. 1863 - Bob's Watches
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![Omega] Now discontinued caliber 1863, are you going to miss it? : r/Watches](https://i.redd.it/91or64c9mpa61.jpg "Omega] Now discontinued caliber 1863, are you going to miss it? : r/Watches")