The Omega Speedmaster 3520.53.00, so-called Mark 40, features a 39mm case, which houses the self-winding caliber 1151. The dial is Grey with Arabic numbers and a striking day-night subdial at 9:00.
The Omega Speedmaster 3520.53.00, so-called Mark 40, features a 39mm case, which houses the self-winding caliber 1151. The dial is Grey with Arabic numbers and a striking day-night subdial at 9:00.
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