3507.51.00Ref

Ref. 3507.51.00, launched in 2005 as part of the Legend Collection, is one of three Speedmaster chronographs with sporty Formula 1-inspired dials and a high-end column-wheel movement. It features a 42mm stainless steel case, curved steel bracelet, and the exclusive, COSC-certified calibre 3301, which includes a vertical coupling, column wheel, free sprung-balance, and 55-hour power reserve, all sealed between a scratch-resistant anti-reflective sapphire crystal and a screw-in case back.