Seiko Quarts Analog Chronograph 7a28-7110 1983
The Seiko Speedmaster 7a28-7110 was the world’s first analog chronograph. No one thought it was possible to make an analog chronograph with quartz. The Seiko caliber 7A28 was discontinued in 1992 and is now a lost technology.
Seiko Chronograph Quartz 7A28-7110 Overhauled 2026.07
In 1983, Seiko made horological history with the groundbreaking Cal. To ensure it performs as impressively as it looks, the watch underwent a full professional overhaul in July 2026. The world’s first analog quartz chronograph – the Seiko 7A28-7110.