Tudor Chronautic 41mm Stainless Steel Black Automatic Chronograph Watch - This Chronautic Automatic Chronograph watch from Tudor is a rare find as it was a model that was in production for only a few years. This timepiece displays a sporty steel case measuring 41mm in diameter, along with a stainless steel bezel with tachymeter scale and a black dial with three sub-dials for 60-second, 30-minute, and 12-hour registers. Powering this watch is Tudor caliber 7750 self-winding mechanical movement with 25 jewels and approximately 42 hours of power reserve. Model: 79380