On July 21st, exactly 50 years after Armstrong and Aldrin set foot on the Moon, Omega re-introduced their Speedmaster Professional Moonwatch caliber 321. In platinum. Meet the Omega Speedmaster reference 3188.8.131.52.99.001. My first Speedmaster was a reference 145.012-67, produced in February 1968 according to the Omega archives and with caliber 321. At the time, in […] Visit Hands-On With The Omega Speedmaster Moonwatch Platinum Caliber 321 to read the full article.