THE EARLY SEIKO QUARTZ: FROM SQ TO QZ - Montres Publiques - The vintage watch magazine
Near NOS 1982 Seiko SQ100 Quartz 6923-7010 – KibbleWatches
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.
Identify] I know it's a Seiko SQ100 but can't find this reference anywhere : r/Watches