IBM TCM Collection 
IBM TCM without handle.
IBM TCM without handle.

IBM TCM without protective carrier.
IBM TCM without protective carrier.

IBM TCM bottom in cooling frame. Probably from a 3081 because of the gold. I believe later models were ceramic.
IBM TCM bottom in cooling frame. Probably from a 3081 because of the gold. I believe later models were ceramic.

IBM TCM identification information.
IBM TCM identification information.

IBM TCM top showing chips. Some broken and missing.
IBM TCM top showing chips. Some broken and missing.

IBM TCM bottom out of cooling frame.
IBM TCM bottom out of cooling frame.

TCM with minimal gold content. I believe they went to more ceramic when gold got expensive.
TCM with minimal gold content. I believe they went to more ceramic when gold got expensive.

IBM TCM with handle and in protective carrier. Check out 

//www.research.ibm.com/
journal/rd/261/
ibmrd2601E.pdf
IBM TCM with handle and in protective carrier. Check out

//www.research.ibm.com/
journal/rd/261/
ibmrd2601E.pdf


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