Montblanc Timewalker Urban Speed UTC. This sporty watch is powered by automatic movement, calibre 24.05 with 21 jewels and power reserve of approximately 42 hours. The stainless steel case is coated with black DLC and comes on a high performance black textured leather strap with a pin buckle. Black dial has white arabics and stick markers, date aperture located at the 3 o'clock position, and 2nd timezone with a day/night indicator.