A Book of Instruction for Operatibng the Victor Standard Adding Machine With or Without Direct Subtraction
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- SIGNED Wraps
- Chicago: Victor Adding Machine Co
Chicago: Victor Adding Machine Co. Wraps. Very Good. A new technology when this was issued, and a precursor to the computer. The company grew into a substantial enterprise. N.d., circa 1920. 8vo. 8 pp. We could find no other copies of this.