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Casio CL-200 Desktop Calculator

Casio CL-200 Electronic Calculator
Circa 1970

Basic 12-Digit, four-function with constant and accumulating total register. Multiplexed Nixie tube display. Utilizes American-made Fairchild four-chip Large-Scale Integration calculator chipset, combined with Japanese-made MOS small- and medium-scale integrated circuit devices, including a NEC keyboard encoder and shift-register ICs, along with Toshiba Nixie Tube driver IC's.