IBM 700 series (701 702 704 705 709) vacuum tube modules. There are eight plug-in modules included in this object record. Only #6 has numbers stamped on it.
Date
1955 ca.
Manufacturer
International Business Machines Corporation (IBM)
Identifying Numbers
Other number
0050E
Ink stamped in black by vacuum tube [not present in current set]
Other number
079
Ink stamped in black on top of #6
Other number
2-J36
Handwritten in pain on top of #6
Other number
317261
Vacuum tube model number (on some vacuum tubes)
Other number
503157
Ink stamped in black on top metal plate of #6
Other number
506646
Ink stamped in black by vacuum tube [not present in current set]