Description: These are the rare blue punch cards from the 1970s with rounded corners (no cut corner). I have a nearly full box of about 1700 of them. I am selling them in lots of 100, so if you want the entire remaining box, you can make an offer for all remaining lots (initially 17). The punch cards are in the IBM format 80 column standard. This IBM card format, introduced in 1928, had rectangular holes, 80 columns, and 10 rows. Card size is 7⅜ x 3 ¼ inches (187 by 83 mm). The cards are made of smooth stock, 0.007 inches (180 μm) thick. There are about 143 cards to the inch (56/cm). In 1964, IBM changed from square to round corners. They came typically in boxes of 2000 cards or as continuous form cards.
Price: 39 USD
Location: Lake Forest, Illinois
End Time: 2025-01-01T18:40:31.000Z
Shipping Cost: N/A USD
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Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: unknown
MPN: 5081
Unit Quantity: 100
Modified Item: No
