OUR GUIDE TO CARING FOR VINTAGE WATCHES

Vintage watches, cherished for their timeless craftsmanship, require careful handling to
preserve their condition & functionality, especially since many are no longer waterproof.

GUIDE TO OPERATING THE SEIKO 7A28 MOVEMENT

The Seiko caliber 7A28 (7A28A) is a quartz chronograph watch movement with 15 jewels. This caliber was introduced in the Sports 100 line of chronograph watches in 1983. It was the world's first analog quartz chronograph movement to use an analog display combined with quartz technology. This was a major technological breakthrough, moving the chronograph function away from only mechanical movements or the digital displays common in early quartz watches.