The most obvious differences between these watches and the consumer 7A28 is that they have fixed bars on the case (rather than spring bars) – a common standard on military watches – as well as a circled P mark on the dial and some other insignia on the rear. In total there were just over 11,000 produced and stamped with MoD numbers. The first 7A28s appeared in 1983 and their successor, the 7A38 – which featured a date and day display on the 3’oclock subdial – showed up a year later, yet the mil-spec model that was made for the RAF was first issued in 1984 and continued unmodified until 1990. To give it the correct name, it’s a Seiko 7A28-7120. There were a number of variants in case style, but the most sought-after of the 7A28 is the military-issued one known as the RAF Gen 1 (and an RAF Gen 2 came along later using a different movement). Seiko claimed numerous world firsts throughout their years, from ( arguably) the first automatic chronograph, the first commercial quartz watch (which, at the time, was way more expensive than mechanical ones), and they also were the first to launch a proper analogue chronograph watch that happened to be quartz – the 7A28.
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