Sinn UX

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Sinn UX GSG9 SDR Dive watch. Official watch of the maritime department of the German military unit GSG 9
© Sinn
Sinn UX SDR Dive watch
© Sinn

Sinn UX (EZM2B), Sinn UX GSG9 (EZM2B)

Dive watch by Sinn

Besides the submarine steel used for the case (like the sister models U1, U2 and U1000) the two-UX models offer a further technical finesse: With the HYDRO technique the movement, dial and hands are directly embedded in a crystal clear oil storage — the watch is absolutely secure against mist, is safe against pressure for each achievable depth and has a total readability from any angle.

Variants with black turning bezel bear the additional designation SDR. The abbreviation EZM2B stands for "Einsatzzeitmesser" (mission timepiece).

The case of this dive watch is made of submarine steel. Conventional stainless steel watch case has no real seawater resistance. Such enclosures are, strictly speaking, not suitable for permanent use in seawater. In search of a steel of higher quality requirements, the engineers finally made a find at the German U-boat dockyard Howaldtswerke-Deutsche Werft and Nordseewerke Emden GmbH.

This material is not only extraordinarily sea water resistant, but it also has the highest antimagnetic quality.


Chronometer quartz movement by ETA
Shock proof according to DIN 8308
Antimagnetic according to DIN 8309


Submarine steel
Ø 44.0 mm, height 14.3 mm
Domed sapphire crystal with anti-glare treatment on both sides
Screw-in crown
Waterproof to 1000 m


Black, indexes with white luminous material
Hours and minutes hand with white luminous material
Red central seconds hand, partially with white luminous colour


Hours, minutes, central seconds with hacking seconds
Date indication
Diving bezel with luminous triangle


Silicon strap with diver's elongation or solid stainless steel bracelet, tegimented


2 years