Seiko SQ 100 Mondphase for $324 for sale from a Private Seller on Chrono24
Seiko SQ100 bezel Gold - Watch Plaza
SOLD 1986 Seiko SQ100 men's watch - Birth Year Watches
1989 Seiko SQ100 Men's vintage watch on the original bracelet. Model reference 5Y23-8A50 - YouTube
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