Printed on a white paper label on the top center of the panel.
Handwritten on a white paper label at the lower right corner of the underside.
Printed in white paint on both the upper left corner of the top of the panel and the lower right corner of the underside.
overall: 11 5/8 in x 26 in x 8 1/4 in
The object is a metal panel with a phenolic board mounted underneath. There are sockets for six octal vacuum tubes; all are populated. There are 12 BNC connectors around the edges, and one 29-pin connector on the left side. A screen-printed label at the upper-left corner of the top, and on the lower-right of the underside, reads "BUS DRIVER FLIP-FLOP STORAGE RACK SERIAL # 3." There is a 3 by 5 card taped to the top with the message "NR3701 - Box2 - #4 BUS DRIVER Flip-Flop Storage Rack #2,3,4" handwritten in red.