Early Military Grade RCA JRC 6C4 Black Plate Tube NOS in Box - Etsy
6135/6C4 GE 5 Star, Medium Mu Triode Tube. Designed to be used as a local oscillator in very high frequency receivers. New old stock. No longer available for export. MFR: GE. SKU:
6C4 CV133 BRIMAR Nuovo Originale Tubo Valvola In Scatola Militare (G15C) EUR 28,16 - PicClick IT
GE 6C4 vacuum tube new old stock mint condition General Electric tube - Etsy Italia