The 2012 version of the FOiS was the reintroduction of stepped subdials to the Speedmaster line, which are now found in the Speedmaster Professionals yet again as well. https://tinyurl.com/3t6hncwk link They're also present here, with sloping steps down to a circular-pattern subdial. The subdials at 3 and 6 o'clock are the 30-minute and 12-hour counters for the chronograph, with white-coated https://v.gd/4MVR5I link hands matching the central chronograph. The 9-o'clock subdial has an Alpha-style hand for https://tinyurl.com/52s8ke3f link the running seconds.