The Seiko 7A28 - like this freshly serviced and all original 7A28-703A here - entered the market during the height of the LCD technology of the 1980s. In 1983, Seiko unveiled to the world the first ever quartz analog chronograph, the 7A28 - a 15 jewel, fully adjustable quartz movement with zero plastic parts in the gear train and a movement that can be serviced and adjusted as with a mechanical watch, due to its innovative construction.
Seiko and its 7A28 was now in the history books as the world’s first analog quartz movement. Unlike the more commonplace digital watch, the 7A38 uses hour and minute hands to tell the time akin to analog watches, and feature a quartz crystal working together with a power cell, circuit board, and a small stepping motor to move these hands. In addition to timekeeping, the quartz crystals also indicated the power reserve or battery life of the watch.
The 7A28 consisted of over forty variations, including models issued to the military and those used in movies (including James Bond and Aliens, among others). Of note, some variations were also issued to the United Kingdom’s Ministry of Defence and the South African Air Force.
This 7A28 comes with a leather strap, NATO strap, Pelican travel case, and springbar tool.
1983 Seiko 7A28-703A Chronograph
DIAL: Original brilliant dark blue/black dial, with original hour, minute, and chronograph hands. The dial on this 7A28 is stunning and superbly detailed, with subtle changes, from dark blue to black, depending how the dial is angled and the light hits it. Day/date at 3 o’clock position works nicely. Dial lume shines nicely, following exposure to strong light.
CASE: Original 38mm x 43mm stainless steel case, with original caseback.
CRYSTAL: Seiko 7A28-correct Hardlex crystal, no scratches.
BAND: This 7A28 comes with a light brown leather strap, as well as a dark blue and red nylon NATO strap - a nice compliment to the sporty nature of this 7A28. Original Seiko 7A28 quartz movement, manufactured in March 1983. This watch received a full service in July 2020.
CROWN: Recessed original unsigned stainless-steel crown and three chronograph pushers.
CHRONOGRAPH PUSHERS: Chronograph pushers depress with satisfying click – no sticking. All chronograph hands reset as designed to zero.