Omega Speedmaster Movements: 1861 vs. 1863 - Bob's Watches
![WTS] Omega Speedmaster Professional - Sapphire Sandwich - Cal. 1863 - 311.30.42.30.01.006 – WatchPatrol](https://s3.amazonaws.com/watchpatrol-storage/img/full/f21413ac014fb147c13f78b993cc1544018a97f7.jpg "WTS] Omega Speedmaster Professional - Sapphire Sandwich - Cal. 1863 - 311.30.42.30.01.006 – WatchPatrol")
WTS] Omega Speedmaster Professional - Sapphire Sandwich - Cal. 1863 - 311.30.42.30.01.006 – WatchPatrol
Caliber 1863 Speedmaster Professional 3572.50
Omega Speedmaster Movements: 1861 vs. 1863 - Bob's Watches
Moonwatch Professional Speedmaster Steel Chronograph Watch 311.30.42.30.01.006 | OMEGA US®
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Omega Speedmaster Moonwatch Caliber 1861 vs 1863 | Bob's Watches - YouTube
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Caliber 1863 Speedmaster Professional 3572.50
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Omega Calibre 1863 | (From Omega Speedmaster ref. 3873.50) D… | Flickr
![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")
Omega] Now discontinued caliber 1863, are you going to miss it? : r/Watches
![Omega] A closer look at the discontinued calibre 1863 on the Omega Speedmaster : r/Watches](https://i.redd.it/cwdtyr1h8vg61.jpg "Omega] A closer look at the discontinued calibre 1863 on the Omega Speedmaster : r/Watches")