The Speedmaster Racing ref. 329.32.44.51.01.001 is the 44.25 mm stainless-steel chronograph with a black ceramic tachymeter bezel, racing-style dial and a leather strap. It is powered by the Master Chronometer Co-Axial Calibre 9900 (METAS-certified, antimagnetic to 15,000 gauss, about a 60-hour…
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