At the heart of this chronograph is OMEGA's calibre 1861, the famous manual-winding movement that was worn on the moon, which is covered by a caseback embossed with the original 1962 Seahorse.The OMEGA Speedmaster is one of OMEGA’s most iconic timepieces. Having been a part of all six lunar missions, the legendary Speedmaster is an impressive representation of the brand’s adventurous pioneering spirit. This OMEGA Speedmaster Professional “Moonwatch” features a black dial covered by a hesalite crystal and graced by a small seconds sub-dial, 30-minute recorder and 12-hour recorder along with a central chronograph hand. The black bezel, with its tachymetric scale, is mounted on a 42 mm stainless steel case and presented on a matching bracelet. At the heart of this chronograph is OMEGA’s mechanical calibre 1861, the famous manual-winding movement that was worn on the Moon. This timepiece is offered with a special Moonwatch presentation box which contains a "NATO" strap, Velcro strap, a tool to change the bracelet and a book highlighting Speedmaster's adventures.