Inspired by the 4th generation Speedmaster worn on the moon Speedmaster heritage with the 3861 calibre movement 42mm 18K Canopus Goldcase paired with a black leather strap Tachymeter and chronograph features OMEGA Master Chronometers are officially certified by METASICONIC HISTORY Famed as the first watch on the moon, the Speedmaster Professional was worn by Buzz Aldrin when he walked on the lunar surface in 1969. The Speedmaster Moonwatch Professional takes inspiration from the fourth-generation style that was worn by Apollo 11 astronauts during the first moon landing. It pays homage to this historic moment with a legendary chronograph inspired by the brands most iconic design. FLAWLESS PRECISIONThis 42mm watch features an asymmetrical, 18K Canopus Goldcase, paired with a classic, black leather strap. Framed by an anodised, aluminium bezel ring, the sun-brushed, silvery step dial features a small seconds sub-dial, 30-minute and 12-hour recorders, along with a central chronograph