1989 Seiko SQ100 Men's vintage watch on the original bracelet. Model reference 5Y23-8A50 - YouTube
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Vtg Seiko Watch SQ Quartz Sports 100 Silver and Gold Tone Day - Etsy
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.
Inherited Seiko SQ100 - How Old Is It? | WatchUSeek Watch Forums