(1) Tested Philco Type 58 Tube Date Code 7S Philco 58 Remote Cutoff Pentode Tube

(1) Tested Philco 6BA6 Tube Date Code 5021 Remote Cutoff Pentode Tube

(1) Tested Tung-Sol 6SG7 Tube Date Code DP3 Tung Sol 6SG7 Remote Cutoff Pentode

6HZ6 Amperex Dual-Control Sharp-Cutoff Pentode Vacuum Tube - NOS - TESTED

(1) Tested Motorola 6BD6 Tube Date Code 58-13 GE EIA Remote Cutoff Pentode Tube

(1) Tested Admiral 6BZ6 Tube Date Code 60-17 Semi Remote Cutoff Pentode Tube

(1) Tested RCA 12BD6 Tube with Box Date Code LV RCA 12BD6 Remote Cutoff Pentode

(1) Tested Sylvania 3CF6 Tube Date Code RAA Sharp Cutoff Pentode Tube