IBM Punch Card Guage
YEAR: 1960
ITEM: Peripheral Device
COMPANY: IBM
COUNTRY: USA
IN OUR COLLECTION: Yes
According to the Centre for Computing History in Cambridge, England this was made in 1960. It is used to calibrate the IBM machines that processed punch cards. The back of this grey, metal guage has a sticker with instructions on how to use it.
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The Registration of all card punching equipment should be checked once each day. This guage should be used to check the registration of all key punches, reproducing punches, and calculating punches.
To use this gauge, punch a test card with 12-9 diagonally across 80 columns and place the card face up 12 edge to the top firmly against the guides at top and right hand end.
Any machines out of registration should be reported to your supervisor immediately.
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OUR DEFINITIONS OF RARITY
One of a Kind: Only known existing item.
Exceedingly Rare: Only 2 to 10 known to exist.
Very Rare: Only 11 to 25 are known to exist.
Rare: Only 26 to 50 are known to exist.
Difficult: Difficult to find.
Available:Can be commonly be purchased.
Unknown: We cannot make a determination.
(For comparison: Many people consider the Apple-1 computer to be rare. As of 2025 there are 92 confirmed and probable Apple-1 computers.)
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