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7591 Tungsol used good 1963 (55ma, Gm=8100)

7591 Tungsol used good 1963 (55ma, Gm=8100)

$ 69.99
7591A Sylvania branded RCA coin-base NOS 1970's (63ma, Gm=10,000)

7591A Sylvania branded RCA coin-base NOS 1970's (63ma, Gm=10,000)

$ 89.99
7591A Sylvania branded RCA used/75% 1968 (51ma, Gm=7,600)

7591A Sylvania branded RCA used/75% 1968 (51ma, Gm=7,600)

$ 49.99
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