Manufacturer Seiko Caliber Number 7A28, 7A28A Type Quartz Diameter 31.1mm (overall) Casing Diameter 29mm Thickness 3.5mm Battery Cell 394 (SR936SW)...
Caliber Spec
Manufacturer Hattori aka Seiko Instruments Inc. (SII) Caliber Number VD77, VD77A Type Quartz Lignes 10.5”’ Diameter 23.7mm Casing Diameter 23.3mm...
Manufacturer Hattori aka Seiko Instruments Inc. (SII) Caliber Number VD51B Type Quartz Lignes 12 3/4”’ Diameter 29.5mm x 26mm (smaller...
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