Omega Speedmaster Moonwatch Professional 310.60.42.50.10.001 Manual-wind watch features a 42mm Moonshine™ gold case with a green ceramic bezel ring surrounding a sun-brushed green dial on a Moonshine™ gold bracelet with a foldover clasp. This watch is powered by Omega 3861. Functions include anti-magnetic, chronograph, chronometer, tachymeter, hours and minutes & seconds. This watch is water resistant to 50m.