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Sharp Compet 12 (CS-12) Desktop Calculator

Sharp-made 12-digit, four function desk calculator with rotary switch settable fixed decimal position. Small-scale MOS IC-design combined with discrete diode-transistor logic. Introduced in 1969. Utilizes Itron vacuum-fluorescent display tubes similar to those used in the Sharp QT-8D. Photo is of model CS-12D. The "D" postfix indicates the revision of the design. Known models are CS-12A, CS-12C, CS-12D. Revisions are mostly internal only. Any and all model CS-12 calculators wanted. OEM's were Facit with the Model 1128, and Addo-X with the Model 9666. Either of these machines are also wanted.