Cray-1 SuperComputer Memory Module Board. Circa 1976. Single sided.Back are ELC

Cray-1 SuperComputer Memory Module Daughter Board. ( Double, Both sides )

Cray-2 SuperComputer Memory Module Daughter Board. Circa - 1982

Cray-1 SuperComputer Memory Module Daughter Board. Circa - 1976 ( Double Sided )

Cray-2 Supercomputer E.L.C. Module. With Lucite With Reverse Letters.

Cray X-MP Supercomputer Board Memory, No Lucite, Board Only. Circa 1984

Cray-2 SuperComputer Memory Module Daughter Board. Circa - 1985. Smaller IC’s.