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Preamp tubes

 
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(!!) (#2 5691 red base) JAN-CRC-5691 RCA Red Base NOS (2-17=1952) in white box (3.0/3.1ma)

(!!) (#2 5691 red base) JAN-CRC-5691 RCA Red Base NOS (2-17=1952) in white box (3.0/3.1ma)

$ 139.99
5691 RCA Red Base black plates used/65-70% 1954 (1.9/2.1ma)

5691 RCA Red Base black plates used/65-70% 1954 (1.9/2.1ma)

$ 59.99
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