1989 Seiko SQ100 Men's vintage watch on the original bracelet. Model reference 5Y23-8A50 - YouTube
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
Seiko Sq100 Deals, SAVE 48% - raptorunderlayment.com
Gents Seiko Quartz SQ 100 5Y23 8A50 Day/date Watch on Original - Etsy
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MEN'S Wristwatch, Seiko quartz, SQ 100, steel. in Sweden
SOLD 1998 Seiko SQ100 watch 7N43-8001 - Birth Year Watches