Case: stainless steel top bezel with titanium case
Size: 53 x 39.5mm
Movement: automatic-winding manufacture caliber UR 5.03 
Function: wandering hours, retrograde minutes, power reserve
Power Reserve: approximately 48 hours
Water Resistance: 30m
Dial: openworked
Hands: luminous hands and markers
Caseback: openings for control board indicators
Strap/Bracelet: hand-stitched alligator leather
Factory Warranty: two years

The UR-105 revisits Urwerk’s iconic satellite indication, an emblematic and instantly recognizable signature element of the brand for almost 20 years. 

You slide the catch on the top of the case to reveal the mechanism of the UR-105. It’s a wandering hour indication based on an openwork carousel, which carries the four satellites, each bearing three numerals for the hours. The hours successively sweep past the minutes scale for an analog and digital display of the time. A power-reserve indicator and digital seconds make up the rest of the information displayed on the dial. The digital seconds are remarkable in that they indicate tens of seconds.

Two pneumatic turbines on the back govern the automatic-winding rate, which can be set with a lever. In the Full position, the slightest movement of the wrist is harnessed to rewind the barrel spring. Turn the lever to Stop to disengage the self-winding system and wind up the UR-105 using the crown. Red (for reduced), an intermediate position, engages the turbines to dampen the winding rotor and avoid overstressing the mainspring if you are particularly active.