Although our focus has primarily been on offering vintage mechanical watches, it is difficult to ignore the charm of a quartz watch that sparked a revolution. During a period when quartz watches were associated with LCD displays and designs that deviated so far from tradition that they hardly resembled wristwatches, Seiko took a step backward to propel watch design forward.
The 7A28 emerged as the world's first analog quartz chronograph, and it would be an understatement to say that they succeeded. With its 15 jewel movement completely devoid of any plastic components, the 7A28 could be finely tuned for optimal performance and constructed in a manner that facilitated the replacement of worn parts.
This level of craftsmanship cannot be said for the majority of quartz movements seen even in today's market. The design of the 7A28 allows for the inclusion of three sub-registers: one to measure minutes, another dedicated to seconds, and a third to tally tenths of a second.
Ships from Tokyo, Japan.
SOLD - Seiko Speedmaster Chronograph 7a28-8040
The 7A28 Chronograph is in excellent condition: The case and bracelet have few light scratches . The rotating bezel is very clean and rotates smoothly both ways. The dial and hands are very clear with no sign of deterioration. There are no visible scratches on the glass. All chronograph functions operate flawlessly as it should. The chronograph has been inspected and is equipped with a fresh cell.
MODEL: Quartz Chronograph Speedtimer
DIAL: Original Black dial
CASE MATERIAL: Stainless Steel
CASE DIMENSIONS: 40 mm Diameter, 42.5mm mm Lug to Lug, 10.7mm Height, 20mm Lug Width
CRYSTAL: Mineral Crystal
CASE BACK: Screw-in Stainless Steel
MOVEMENT: Seiko Quartz 7A28 15 Jewels
Manufacturing date: February 1983
Service History: Battery replaced
Bracelet/Strap: Original and correct Seiko Speedmaster AA58A