Two Strong Used SIEMENS Silver Plate Type 12AU7 / ECC82 Tubes. Double support halo getters with copper grid posts. Production codes: Gf0/#2K and Gf?/#2C. Tested on military TV7 tube tester. With 56 being minimum reading for a good tube , these tubes read 98/98 and 106/103. Hard to find ! Buyer to pay shipping. Shipping combined on multiple purchases. Thank you for looking !!!