Seiko QC-951 (help) video added | WatchUSeek Watch Forums
Seiko Crystal QC-951 First Quartz Marine Chronometer Desk Clock Circa 1963 | eBay
Die „Kristalluhr“ - Deutsches Uhrenmuseum
SEIK O CRYSTAL CHRONOMETER QC-951 Seiko, Japan, 'Crystal Chronometer QC-951', No. 10637, Made in the later 1960s. Fine quartz, electronic, center-seconds chronometer. Accompanied by the original fitted box. | Important Modern &