SIGNED OMEGA, SPEEDMASTER, PROFESSIONAL MOONWATCH CO-AXIAL MODEL, NO. 21/57, MOVEMENT NO. 78'326'181, CASE NO. 78'326'181, CIRCA 2007

Omega produced five limited series to celebrate the 50th anniversary of the iconic Speedmaster. The present watch is part of this commemoration in a limited edition of only 57 examples. This number has an unusual designation, reflected in gilt on the dial below the 12 o’clock position.