The Sinn U2 case is made out of German submarine steel that is guaranteed to be corrosion-proof, as well as impervious to salt water. The bezel is almost scratch-proof due to a process called "Tegiment" which causes steel to harden to ceramic levels. It is a GMT, which is very convenient if you are not in your home time zone. I am not sure the dial and look really appeals to me, but the 2000m dive depth, German engineering and GMT function definitely does.

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