Volume 21, Issue 4 (October 1976)

    Identification of IBM Keypunch Machines by Their Printed Products

    (Received 26 February 1976; accepted 18 March 1976)

    Published Online: October

    CODEN: JFSOAD

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    Abstract

    A little over a year ago, the Document Division of the United States Army Criminal Investigation Laboratory received a referral requesting the examination of 44 keypunch cards to determine the machine responsible for their preparation. Supplies were being diverted, and the shortages were covered by the preparation of fraudulent keypunch cards. The contributor of the case also submitted known standards from the 15 keypunch machines most likely to have been responsible for the preparation of the fraudulent cards. The questioned cards were approximately 7 ⅜ in. wide by 3 ¼ in. high (187 by 83 mm), contained a series of punched holes, and bore printed characters consisting of a series of dots along the top of the cards (see sample, Fig. 1). Our first impression was FIG. 1—A sample card from an IBM keypunch machine. that this would be another tedious, complex, time-consuming examination; however, as work progressed on the examination, the case became extremely interesting and very rewarding from a document examiner's viewpoint.


    Author Information:

    Curvey, CE
    Examiners of Questioned Documents, U.S. Army Criminal Investigation Laboratory, Fort Gordon, Ga.

    Eaton, CE
    Examiners of Questioned Documents, U.S. Army Criminal Investigation Laboratory, Fort Gordon, Ga.


    Stock #: JFS10581J

    ISSN: 0022-1198

    DOI: 10.1520/JFS10581J

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    Author
    Title Identification of IBM Keypunch Machines by Their Printed Products
    Symposium , 0000-00-00
    Committee E30