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(!!!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (53/40 and 53/40)
(!!!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (53/40 and 53/40)
By Tube World
$ 21.99
1 tube) 6X4 SER = LM Ericsson Sweden NOS "D" getter 1950's in SER box
Aktiebolaget Svenska Elektronror = Limited Company Swedish Electron Tubes
53/40
53/40
40=65%
50+=100%
Recommended for
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KONDO KSL M7 preamp
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Audio Note M7
See more: vacuum tube