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Monroe 6120 - 12 Digit Handheld Heavy Duty - Printing Calculator 3.6 LPS 6120
Monroe 7140 12 Digit, Storage. Accumulator, GT Register, 1 Memory Register Independent Memory, Extra Fast Printing Adding Machine Calculator # 71 40 / 71-40
Monroe 8145 - 14-Digit 5.0 LPS Black Heavy Duty Desktop Print-Display Printing Calculator, M8145,M 8145, 81-45