Bidspirit auction | IBM Punch Card Registration Tool

IBM Punch Card Registration Tool & Dot Matrix Launch Print Out - A very rare IBM Punch Card Registration Key Check Guide. These punch cards were used to input information into the IBM 4341 and the GE 635 computers but if the cards punch out of square the computers did not function correctly so the cards need to be checked every day for accuracy with this check guide. Included in this lot is an IBM 635 computer printout of a Rocket Launch produced with an early Dot Matrix printer. All are in very good condition but some of the sheets have separated on the edge tear lines.