Original 1967 Houston business trade magazine vintage ad for W. H. DAVIS COMPANY, INC.  Main office was located at 3812 Travis Street, Houston, Texas.  Facit Odhner for the worlds offices. Facit Electronic Desk Calculator, model 1121. Nixie tube display.  Silent, so fast you wont believe it. Automatic decimals are worth their weight in gold for addition, multiplication and division.  Automatic credit balance. Odhner XX. Multiplying-Adding Machine. Electric Adding Machine. Extra Fast Operation. ​This old dated one page office equipment magazine advertisement would display beautifully matted and framed.