This subregister has been embellished with a concentric design which contrasts beautifully with the existing sunburst dial. The RA-AP00 SS is also the only contemporary classic watch to date to feature Arabic numeral hour markers (the Version 2 has Roman numerals), posted at twelve, three, six and nine. And akin to the versions two and three, the SS opted for a borderless date display. Where the RA-AP00 SS converges with the rest of the contemporary classic collection is with its domed dial, domed crystal and overall size. The dimensions are nearly identical to its predecessors at 40.5mm wide and 12mm thick. Another first is a see through, exhibition case back. The watch is powered by the new caliber F6222 mechanical movement, a variant of the caliber F6724 that runs the rest of the AC00 line.