This auction is for (2) 6L6GA SYLVANIA Used Tubes. Hickok RD-1575 tested. Test: #1- GM=5500, #2- GM=5500. Minimum 3600. Date codes match K4 (1944). GM Test & Date codes match. The tubes will be shipped in plain white tube boxes.I
used my Hickok RD-1575 laboratory tube tester for testing these
tubes. This tube tester has been calibrated by ( Roger Kennedy 2017 ). SEE PHOTO.... If you have any questions or issues after receiving your item, please contact me prior to leaving feedback so that I may address them. Free Shipping in the U.S.