Omega Speedmaster Prof. Moon 3570.50 Hesalite crystal 1861 Caliber Listing ID: 231828

Omega Speedmaster Professional Moonwatch ad: $3,350 Omega Speedmaster Prof. Moon 3570.50 Hesalite crystal 1861... Ref. No. 3570.50.00; Steel; Manual winding; Condition 1 (mint); Year Mid 2000s; Location: Unit