Photo by Torsten Bolten (public domain), via Wikimedia Commons · shown: Speedmaster family photo
Speedmaster Racing
The Racing branch of the Speedmaster: minute-track variants drawn from 1968 Speedmaster "racing dial" references, paired with the Master Chronometer cal. 9900 in the 2017-onward generation. 44.25mm automatic chronograph; the racing scale and applied tachymetric numerals separate it visually from the Professional.