PublisherInternational Business Machines Corporation (IBM)
Place of PublicationSan Jose, CA
Dimensionsoverall: 8 in x 10 in
DescriptionB&W image of Walnut keypunch. Close up view showing card path with a card having data punched withmicrofilm also.
Verso: Red stamp: "Date3/17/60 Negative No 2454 Title Walnut File (Mock-up) ; Project or Department No 939
Authorized by Austin Higginson IBM Research Department No 508 "