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

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

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

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 E.L.C. Electronic Module Daughter Board. Circa - 1985

Cray-2 Supercomputer Memory Module. Small IC’s. Near Perfect Lucite Edges! USA

Cray X-MP Supercomputer Memory (2/3 )Module. With Lucite With Reverse Letters.