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The screw-down crown also features a new design, featuring a five-pointed star link in relief and multiple finishes. Zenith is also using its modular, quick-change integrated bracelet system for the first time in a stainless steel watch (it debuted in last year's titanium Defy Extreme).

Limited to 1858 pieces, this new version of the 1858 Geosphere is accompanied by a robust khaki NATO strap to link follow you in your quest link for exploration. To check their reliability and precision, they have all link undergone the Montblanc Laboratory 500 Hours Test.