This is a true classy icon! The Omega Speedmaster Professional reference 145.022 was the very first Speedmaster to use the caliber 861, which replaced the revered caliber 321 from the very first models. This was just about the only significant change made to the faithful Speedy, as you have the same 42 mm case with lyre lugs of the previous reference 145.012 and attractive stepped dial. Additionally, this Speedy still comes with a Pre-Moon case back, before the moniker, “The first watch worn on the moon,” was engraved on it. This early version comes with the patina we love on the handset and the indexes, and - even better this one got a rare, original DON-bezel! If you search for a true icon, a newly serviced and authentic chronograph with great history - THIS IS the watch you need!