1984 Royal Air Force /Royal Navy Helicopter Pilot’s Watch British Military Issued with Broadarrow and Correct Military Issue Numbers 6645-99 7683056 on Case-Back. Generation 1 Watch with Higher Grade Movement and Mineral Glass

This is the first, or Generation 1, Seiko military watch model to be issued by the RAF and was procured primarily for Royal Air Force pilots and navigators but was later also issued to Royal Navy Helicopter Pilots. According to documents there was 11,307 pieces of the Seiko military model Generation 1. This model features a stainless steel case. It is powered by the highly-regarded, 15-jewel, quartz 7A28 Seiko movement. RAF-issued Seiko military Generation 1 watches have three pushers and has all the usual chronograph functions including split timings and 1/10 sec timing as well as second and minute indicators up to 30 minutes. The sub-dial measures tenths of a second actively until 10 minutes have passed. Once the chronograph is stopped the hand will move to the correct position indicating the tenths of a second that have elapsed. As a result of the application of Promethium 147 (a mildly radioactive emitter), the dial has luminous markers. The case excluding the crown and pushers measures 37mm across and has an inter-lug width of 20mm. As it is required by the MoD, all Seiko military models fit fixed strap bars. The crystal on this watch is mineral glass and is scratched from military action and use and although Seiko no longer carries the original crystal replacement generic mineral glass replacements can be fitted.