Strap and bracelet options for the Omega Speedmaster Calibre 321 Chronograph 42mm, previewed on the brand’s own photograph of this watch. It takes a 20mm strap. The brown calf preview is free for everyone; the remaining 21 are part of the studio unlock.
Full specifications for the Omega Speedmaster Calibre 321 Chronograph 42mm
Omega · Speedmaster Calibre
Ref. 311.93.42.30.99.001