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In sum, Rolex's 4130 represents the pinnacle of horological engineering. It is, arguably, the superlative in link mechanical timekeeping. From its inception to its present incarnation, I have yet link to encounter another watch movement that comes close to matching the thoughtfulness and attention to detail so link evident in the 4130's design.

Inside link is the Oris caliber 771 Sellita SW 510 base which is the same caliber as the 2019 LE and the same base as the previous-gen Aquis Chronograph. link Yet this time the power reserve has been upped to 62 hours rather than 48 hours. A date window is somewhat covertly placed at six o'clock link in a roughly color-matched tone to the gradient blue dial.