(1) Tested Sharp Japan 17JZ8 Tube Date Code 8-7 Medium Mu Triode Power Pentode

(1) Tested Sylvania 6N7 Tube Date Code 8-26 Medium Mu Twin Power Triode Tube

(1) Tested Sylvania 2AF4B Tube Date Code XY Medium Mu Triode Tube

(1) Tested Dumont 6S4A Tube Date Code 61-26 Medium Mu Triode Tube

(1) Tested Sylvania 6ES5 Tube Date Code AAU High Mu Triode Tube

(1) Tested Sylvania 6MD8 Tube with Box Date Code fd AJD Medium Mu Triple Triode

(1) Tested Sylvania 7A4 Tube Code 713 Loctal Tube Medium Mu Triode Loktal Tube

(1) Tested Sylvania 6JZ8 Tube with Box Date Code hl AAO Medium Mu Triode Pentode