Jaeger-LeCoultre’s historic Polaris model was first produced between 1965 and 1968 and introduced a revolutionary amplified underwater alarm function for divers. The latest update to the Polaris line is the Jaeger-LeCoultre Polaris Date. Featuring a hand-lacquered, blue double-gradient dial with sun rayed, grained and opaline finish, the central disc and main dial now incorporate a shimmering, colour-change effect.

£7,400; jaeger-lecoultre.com