6072A RCA Twin Triode Tube. Special version of the 12AY7. Made with three pieces of mica, halo getter, and black anode plates. Tested on TV 7. MFR: GE. SKU: 6072-GE. New old
6072A JAN GE 6072 12AY7 TUBO PIASTRA NERO NOS NUOVO CON SCATOLA *eTRACER* | eBay
6072 GENERAL ELECTRIC 12AY7 6072A COPPIA VALVOLA PREAMPLIFICATORE AUDIO