Vintage Ceramic RCA CDP1821 from 80s from Working System Quantity 1.I have no way of testing these ICs, therefore I can not guarantee that they operate correctly.  If they don't, contact me and I will make it right. These ICs are an excellent example of old technology with the purple ceramic and gold-plated legs.  If you buy all 4, I will ship them free. They are not cosmetically perfect since they are removed from sockets on a working system. A few of them have solder spots on a leg due to repairs of adjacent components of board, I would assume. None have been soldered onto a board.

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