Artifact Details Title IBM 1620 Console Type Ball Catalog Number X1583.99F Type Physical object Description Early Selectric element, Type 938 Note: the small size type element release tabs atop each element. These were later made larger as secretaies companied and then replaced by a 'pump handle' type lever. Date 1959 ca. Manufacturer International Business Machines Corporation (IBM) Place Manufactured U.S. Identifying Numbers Model number Type 938 Other number 10 stamped in top of ball Dimensions 1 1/8 x 1 1/4 x 1 1/4 in. Category Miscellaneous/other Lot Number X1583.99A-H