(1) Tested Garod 6AC7 Tube Date Code 0-09 Garod 6AC7 Sharp Cut Off Pentode (b)

(1) Tested Sylvania 6AC7 Tube with Box Code FF Sharp Cut Off Pentode Tube

(1) Tested Truetone 6AC7 Tube Date Code 248 Sharp Cut Off Pentode Tube

(1) Tested Westinghouse 6AC7 Tube Date Code 1-22 6AC7 Sharp Cut Off Pentode Tube

(1) Tested RCA 6AC7 Tube Date Code 352 RCA 6AC7 Sharp Cutoff Pentode Tube

(1) Tested RCA 6AG5 Tube with Box Date Code KH RCA Sharp Cutoff Pentode Tube

(1) Tested CBS 6BW8 Tube with Box Date Code DO Twin Diode Sharp Cutoff Pentode

(1) Tested Raytheon 6HS8 Tube with Box Japan Code J-16 Sharp Cutoff Twin Pentode