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With an 80-year legacy the distinctive reversible case is nothing new, but the 1931’s 7.27 millimeter thickness adds an entirely new paradigm.
That thinness is born of the watch’s hand wound calibre 822, which is just 2.94 millimeters thick, with 19 jewels and a power reserve of 45 hours.
Its 42mm case has a silvered 18-carat gold engraved dial and blued steel hands.
Today it is nearly always used with the idea of supporting something or someone in all circumstances, as in the example.
By basically reengineering the Eco-Drive quartz movement from top to bottom, Citizen created a solar-powered movement that’s 1mm thick.
Because the entire case is only 3mm thick, it’s made from specially hardened stainless steel and a ceramic/metallic alloy called cermet.
Bulgari also makes a version of the Octo Finissimo featuring the worlds smallest tourbillon movement at just 1.95mm, as well as a minute repeater version that, at 8.1mm, is the thinnest minute repeater watch currently in production.
Lately, Vacheron Constantine has done a lot to reinvigorate the Overseas line of sports watches, including new in-house movements and a world time version.
Among the absolute slimmest — we put the bar at 10mm, including the crystal — the leanness of the stacked parts is a holistic philosophy, depending on everything from the movement to the dial, hands and case.