The object is an IBM card assembly consisting of three cards, two of which (the largest,14" x 5", and smallest, 2.75" x 1.5") are permanently connected together. The third card (a GPIB interface card , 5" x 5") is connected to the other two with a single wire. The largest card appears to be a graphics card, and the purpose of the other two is unknown. At least one of the cards was made in the USA.
Manufacturer
IBM
Place Manufactured
USA
Identifying Numbers
Other number
15 1529
Embossed in solder on the solder side of the largest card