Handwritten on a white sticker at the back of the unit.
Printed in white in the upper left corner.
overall: 16 in x 26 in x 8 1/2 in
The unit is a metal panel bearing sockets for 10 octal tubes, four of which are populated, and 12 BNC connectors. There are two power connectors on the left side. On the bottom there are two indicator lights, one for each flip flop.