Caliber 1866 Technical sheets Omega Speedmaster Professional Moonphase Caliber 1866. Click for full size. Omega Speedmaster Professional Moonphase Caliber 1866 Omega Speedmaster Professional Moonphase Caliber 1866 Omega Speedmaster Professional Moonphase Caliber 1866 Share this:Click to share on Facebook (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to print (Opens in new window)MoreClick to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Like this:Like Loading...