Seiko gave us the world’s first quartz analog chronograph in 1982, and the precision and build quality made an indelible impact on Great Britain’s Ministry of Defence. When durability and reliability matter most, replacing issued pilot’s watches was a carefully considered propostion. After more than a decade of Valjoux 7733’s produced for the MoD by a handful of manufacturers, the early 80’s saw the Brit’s come to rely on a single Seiko model for Royal Air Force pilots. The 7A28-7120 is documented as having been issued to RAF pilots as early as October of 1984, and faithfully fulfilled it’s duties until it was replaced in late 1990 by yet another Seiko model, the 7T27-7A20. These earlier 7A28’s, or Gen. 1 chronographs as they are often referred to, are a top tier acquisition for many collectors. They can be difficult to source, and sprawling demand sees available examples move faster than a Panavia Tornado. From November of ‘86, this example is incredible. The dial is absolutely perfect. A soft matte black with three recessed sub registers and clean white printing throughout. The “P” encircled mid-dial indicates the use of Promethium as the luminous material used, and it is flawless on both the hour markers, as well as the satin finished “pencil” hour and minute hands. A steep “count up” chapter creates well balanced depth, and the white chronograph hands offer perfect contrast. The case is crisp with razor sharp corners, and the factory sandblast finish shows very little wear. The architecture is nothing if not utilitarian. Sloping tapered lugs hug the wrist, and an integrated bezel ensures durability. The case back bears the wear marks of the original G10 strap, but the markings are still crisp and legible at a glance. 6645 denotes its Federal Supply Group and Class, followed by 99, Britain’s Country Code. Beneath that, 7683056 which indicates the specific NSN (NATO Stock Number) for this model. Many countries also employ words or symbols as an identifier of ownership, and in the case of Great Britain, it’s the familiar “Broad Arrow” or Pheon. An important detail as it is a reminder that this watch may be carried by a RAF pilot, but it is the property of the Crown. Further, it carries an individual production number, 4643, followed by /87 to indicate an acquistion year of 1987. Lastly, the individual six digit Seiko serial number 6N5907. The case back screws down to ensure protection of the 7A28 inside, and after service and a fresh battery, it is keeping perfect time. The chronograph pushers offer buttery smooth operation, and all functions operate correctly. It is completely original including the hardlex crystal. With only a couple of very light blemishes we opted not to replace it. With fixed lug bars, we chose to pair it with an adjustable single pass in olive drab with a barley stripe for a military finish that’s still comfortable on the wrist. A truly rare “bird,” this opportunity is sure to be short lived, and would be an historic addition to any collection. 

CNS Olive with Barley Stripe Adjustable Single Pass Nylon Strap

Serviced 11/7/21

Diameter- 37mm

Lugs- 20mm