1989 Seiko SQ100 Men's vintage watch on the original bracelet. Model reference 5Y23-8A50 - YouTube
Inherited Seiko SQ100 - How Old Is It? | WatchUSeek Watch Forums
Seiko Alarm Chronograph SQ100 ref.7T32-7C40 vintage for $272 for sale from a Private Seller on Chrono24
SOLD 1998 Seiko SQ100 watch 7N43-8001 - Birth Year Watches
Seiko SQ100] inherited this piece from my granddad about a year ago. I wear it with absolute pride but I've come to realise I don't know much about it. When was it
Seiko SQ 100 for $111 for sale from a Private Seller on Chrono24