Designed with aviators and world travellers in mind, the Bremont ALT1-ZT/51 watch is an updated version of its hugely popular predecessor, the ALT1-Z, which was launched in 2007. The ZT stands for Zulu Time and allows the wearer to display local time together with the official world time standard. The 43mm hardened stainless steel case features a patented, inner bi-directional Roto-Click bezel, with an integrated flat crystal case back. The metal dial is clean and legible, with SuperLumiNova-coated nickel hands, and the 24hr function has been moved to the bezel for improved clarity. Powered by a modified calibre 13 BE-54AE automatic chronometer, the Bremont ALT1-ZT/51 has a 42-hour power reserve and a Bremont decorated skeletonised rotor.