The Omega Speedmaster Moonwatch Professional Co-Axial Master Chronometer Chronograph uses Omega's METAS-certified caliber 3861. It measures 42mm x 13.6mm and features 50m of water
link resistance; it
link has a
link Hesalite crystal and closed caseback. MSRP: $6,600 on bracelet. For more, visit the Hodinkee Shop.