A Citizen Titanium watch, Citizen Caliber 4111A, Reference Nr.: 4111-571223, calendar at 6. Signed front: ”CITIZEN, Titanium, with Solar Cell, WR100”, back: ”Citizen Watch Co, Water Resist, Base Titanium TI, 4111-571223-TA, 420310, GN-4W-S, Japan->12”, inside: ”Citizen Watch Co., 4111A, Unadjusted, One 1 Jewel”. Titanium Case and band. A solar cell is integrated in the dial, generating electric power by the sunlight, which then is collected in an MT621 capacitor. This would be an Eco-Drive watch, but at that time the brand was not yet established.
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