SOLD 1989 Seiko SQ100 5Y23-8A50 - Birth Year Watches
Seiko SQ 100] Nothing like nos for that vintage itch : r/Watches
Seiko Sq100 sports for $439 for sale from a Private Seller on Chrono24
Sold at Auction: Gentlemans vintage SEIKO SQ 100 Quartz wristwatch finished in silver tone with stainless steel bracelet. Day/Date model with sweeping second hand. Working when tested. Excellent condition for age.
Seiko Quartz SQ 100 Mens Day/Date Watch 6923-7039, New Battery | eBay