Artifact Details Title American adding machine Catalog Number XB180.81 Type Physical object Date ca. 1920 Manufacturer American Can Company Place Manufactured U.S. Identifying Numbers Model number American Adding Machine Dimensions 8 1/2 x 8 x 9 1/2 in Category Calculator/mechanical Collection Title Gwen Bell artifact and book collection Series Title Pre-computing artifacts Credit Courtesy Gwen and Gordon Bell Lot Number XB180.81