Omega Speedmaster ref 311.30.42.30.01.005 sports several iconic moon watch features including a black dial and tachymeter bezel hesalite crystal and hand-wound movement. The Speedy was famously the first watch worn on the Moon a title Omega continues to celebrate by releasing countless editions of the beloved lunar-exploring watch. Ref. 311.30.42.30.01.005 is a modern Omega outfitted with a 42mm case with twisted “lyre” lugs a matching metal bracelet and the caliber 1861 mechanical movement – a descendant of the hand-wound movement that once accompanied NASA astronauts to the Moon.