6072A GE GENERAL ELECTRIC 6072 12AY7 BLACK PLATE NOS TUBE *eTRACER* | eBay
Amazon.co.jp: 12ay7/6072 a EH Normal Vacuum Tube PX10 : Electronics
12AY7 / 6072 A NOS / USA. Laboratorio Musicale
6072A GE BLACK PLATE TUBE 6072 12AY7 NOS NIB NATIONAL LABEL *eTRACER* | eBay
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