40mm case in Stainless steel.  Updated case profile, indexes, proportions and bezel.  Automatic in house Rolex Calibre 4131 (new for 2023) using Chronergy escapement, Parachrom hairspring and Paraflex shock absorbers, optimised ball bearings for the winding system, superlative chronometer -2/+2 sec per day after casing.  Power Reserve is 72hrs.