The object is a medium-size metal panel with 9 BNC connectors and one multi-pin male connector. There are sockets for 8 vacuum tubes of which 6 are populated. One set of clear indicator lights is attached to the object. Etched on the object on both the bottom and the top is "301 register."
Date
1951
Manufacturer
Massachusetts Institute of Technology (MIT)
Identifying Numbers
Other number
A15-5
Written on a sticker attached to the back of the object