S. Epson Corp. Caliber Y121EManufacturer S. Epson Corp. (Seiko/Hatori) Caliber Number Y121E Type Quartz Size 6 3/4”’ x 8”’ (15.3mm x 18.1mm) Height 2.99mm...Quartz·16
Hattori SII Caliber VD53BManufacturer Hattori aka Seiko Instruments Inc. (SII) Caliber Number VD53B Type Quartz Size 12 3/4”’ (29.5mm) Height 4.57mm thick Jewels...Quartz·15
S. Epson Corp. Caliber YM62AManufacturer S. Epson Corp. (Seiko) Caliber Number YM62A Type Quartz Diameter 10.5”’ x 12”’ ( 24.1mm x 27.6mm) Thickness 3.7mm...Quartz·8
