Bremont Boeing BB1-SS-WH Modified calibre 11 ½”’ BE-36AE automatic chronometer movement. Steel 43mm case which is water resistant to 100 meters. 25 Jewels, 28,800 BPH, 38 hour power reserve. Bremont Boeing moulded and skeletonised decorated rotor. Functions: hours, minutes, seconds and date . Bi-directional rotating bezel. Metal dial with Super-LumiNova® coated hands and numerals. Sapphire crystal case back. Brown leather strap with white stitching and steel pin buckle. Additional Seattle (organic polymer) strap.The Bremont Boeing Model 1 is manufactured from Custom 465® Stainless Steel. Custom 465® Stainless Steel is an extremely tough, double vacuum-melted, age hardenable alloy developed for the aerospace industry and used by Boeing, for example, in the undercarriages of F-18s and 747 Jumbo jets. Box and papers dated July 2015. Our reference S21791.