The record contains 11 IBM punch card of the small size used with the system/3. Found inside a card punch catalogued separately as an example of an unusual card format.
Identifying Numbers
Other number
817401
Engineering change number stamped on the envelope
Part number
2595081
Stamped on the envelope
Serial number
M/C no 5503406
Handwritten on the envelope
Dimensions
Card: 1/8 in x 2 1/4 in x 3 1/4 in; Envelope: 1/8 in x 4 1/8 in x 6 3/8 in
