1 NOS RCA 6AZ8 Medium Mu Triode Cutoff Pentode

(1) Tested RCA 5BR8 Tube with Box Date Code AQ Medium Mu Triode Cutoff Pentode

(1) Tested RCA 6GH8A Tube with Box Date Code HE Triode Sharp Cutoff Pentode Tube

(1) Tested RCA 6AU8 Tube Medium Mu Triode Sharp Cut Off Pentode Tube

(1) Tested RCA 6JV8 Tube with Box High Mu Triode Sharp Cutoff Pentode Tube

(1) Tested RCA 6BA8A Tube Date Code NR Medium Mu Triode Cutoff Pentode 6BA8 A

(1) Tested RCA 6BH11 Tube with Box Medium Mu Twin Triode Sharp Cutoff Pentode

(1) Tested RCA 6BR8A Tube with Box Date Code CB RCA Triode Pentode Tube