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Vintage estate find. ESTIMATED TO HAVE OVER A 1/4 OUNCE OF PURE GOLD IN THIS BABY!!.
EARLY, IBM 3081 Mainframe CPU MCM (multi-chip module) vs. later models called TCMs (thermal control modules), MCP 41388312, P/N 4458974, with IBM 370 Mainframe Computer Chip with “heat sink”.
It is great cosmetic condition with pins and silicon dies protected by its metal frame (called a heat sink), as pictured. Please see photos

Documentation