Today Omega's finally announced what we all pretty much knew to
link be inevitable: a standard-production Moonwatch, but with the co-axial escapement equipped, Master Chronometer-certified caliber 3861. The caliber 1861 is now officially discontinued, marking the final retirement of what had until now been the most recent heir to the original caliber 321, after a
link production run in the Speedmaster
link Professional Moonwatch of fifty or so years (the calibers 861/1861 began to replace the 321 in 1968/69).