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.
Date
1973
Manufacturer
Hewlett-Packard Company (HP)
Place Manufactured
USA
Identifying Numbers
Other number
02100-60080
Etched and stamped near front on top of board
Other number
09L
Etched in front corner on top of board
Other number
1216-S
Scratched near back on top of board
Other number
1802A0 5993
Printed on white label near front on top of board
Other number
APR 4 '78
Stamped on white label near rear corner on back of board
Other number
B-1049-22
Revision number etched in front corner on top of board