The Bremont Zulu Chronograph in Stainless Steel. Reference Number: ALT1-ZT/51. The ALT1-Z has proven to be widely popular amongst the military squadrons Bremont works with, a significant and ever-increasing part of the Bremont business, and further to feedback from this sector has seen a new version launch in the form of the ALT1-ZT. This is the first time that the design has been developed since the Z series launched in 2007. It boasts a cleaner dial with new applied SuperLumiNova® index markers on the dial and the 24hr function has been moved to the bezel for greater clarity. Greater detailing around the stepped sub dials with micro lines has been made to give the dial more depth. Housed in a 43mm case, it’s a modified calibre 13 ¼”’ BE-54AE automatic chronometer, 25 jewels, Glucydur balance, Anachron balance spring, Nivaflex 1 mainspring, 28,800bph, 42 hour power reserve and a Bremont decorated skeletised rotor, making this pilots watch truly unique. The watch comes in original packaging, with a set of documents.