Stamped on white label near rear corner on back of board
Revision number etched in front corner on top of board
Stamped in front corner on top of board
overall: 1/2 in x 8 in x 8 3/4 in
This is a 4 layer PCB with double sided edge connectors at the front and rear. The top is populated with DIP integrated circuits and a variety of discrete components including many metal can transistors. The left card extractor has "ID(16K)" stamped on it. This board is part of the memory controller for an HP2100 minicomputer.