Introduced before Baselworld in 2008, the U1000 took the Mission Timer series to the next level for Sinn. Designed to be the ultimate dive watch, the U1000 features left-side crown and chronographpushers like many other Sinn EZM watches. The case is made of steel from a German submarine maker and is treated with TEGIMENT technology for extreme scratch resistance. Notably, the watch is resistant to depths up to 1,000 meters (100 bar) even without screw-down chronograph pushers.
The U1000 uses Sinn's Calibre SZ02, a modified Valjoux 7750 with a 60-minute chronograph counter rather than the typical 30-minute totalizer. The "rotation" of the movement, placing the crown at 9:00, moves the subdials 180 degrees from their typical position, with the small seconds hand running on the dial at 3:00 with no markings.
This model was typically called "U1000" but was also marketed as "EZM 6". It was produced through 2018.