(1) Tested Very Strong RCA 2CY5 Tube Date Code CS Sharp Cutoff Tetrode Tube

(1) Tested RCA 2CY5 Tube with Box Date Code AR Sharp Cutoff Tetrode Tube

(1) Tested RCA 2CY5 Tube with Box Date Code EW Sharp Cutoff Tetrode Tube

(1) Tested Strong RCA 2CY5 Tube with Box Date Code EA Sharp Cutoff Tetrode Tube

(1) Tested Very Strong RCA 2CY5 Tube with Box Sharp Cutoff Tetrode Tube

(1) Tested Muntz 2CY5 Tube Date Code 61-43 Sharp Cutoff Tetrode Tube

(1) Tested RCA 6CY5 Tube with Box Date Code DJ Sharp Cutoff Tetrode Tube

(1) Tested GE 2CY5 Tube with Box Code MJ General Electric Sharp Cutoff Tetrode