briston clubmaster diver pro gmt acetate blue 312 YEARS WARRANTY QUARTZ MOVEMENT 42mm 10 ATM CHRONOGRAPH DATE, TORTOISE SHELL ACETATE, NAVY BLUE SUNRAY DIAL AND NAVY BLUE NATO STRAP The Briston Clubmaster Sport Acetate Watch offers a sportier look with a 42 mm case and a tachymetric scale for the chronograph model, not to mention its interchangeable NATO strap. Featuring a navy blue sunray dial and 2 black counters, this watch is inspired by the lines of the racing cars of the 60s.