The Large used hour markers along with the skeletonised hands, much like the bezel numerals and indexes, are generously dealt with with "vintage" Super-LumiNova for Increased readability in inadequate light problems. The outsized hour markers make the Seamaster 300m on the list of quickest watches to tell the time with. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/