L413 re134 tube Valvo Germany preamp tubes globe old production pre war WW2 WWII

one tube type l413 = re134 Valvo made in Germany old early tube triode dht tested super strong on tube tester funke w19s = 27mA results (reference good at 18mA) original vintage spare of postal service amplifier , rare tube original vintage for a great project diy pre amplifier or driver tube foe exotic project

one tube = 1 valve = 1 piece 

box 154