These are basically the Dark Side models in steel
(or more accurately, the Dark Side lineup was basically just these 9900 models in ceramic)
The Speedmaster Super Racing has the Spirate System, which increases the potential accuracy of the watch as it allows the adjustment to be much finer. It's specified to be within 0 to 2 seconds fast per day, and typically is accurate to within one second per day.
S SpqrIncorrect. The Dark Side/Grey Side/White Side are the ceramic versions of the Cal.9300 Speedmaster Moonwatch Co-axial released in 2012. The case shape is very different to the Racing Master Chronometer Cal.9900 watches.
@EuroDriver Please post pics of your 44mm Racing on the strap once you get it! Thanks!
@EuroDriver Please post pics of your 44mm Racing on the strap once you get it! Thanks!