Pluggable test module - 27G1 F
||Stamped on solder side, bottom left
||Stamped on board side, bottomn left
||Stamped on board side, top left
overall: 1/8 in x 6 1/2 in x 5 1/2 in
Connectors are very similar in look to those of Scientific Data Systems (SDS) connectors, however, there is no evidence of manufacturer.
Gift of Rudolf F. Wrobel