Nos Matched Pair Mullard Cv378 (gz37) Rectifier Vacuum Tubes Tested I. 10277. C

Nos Matched Pair Mullard Cv378 (gz37) Rectifier Vacuum Tubes Tested I. 10277. C
Nos Matched Pair Mullard Cv378 (gz37) Rectifier Vacuum Tubes Tested I. 10277. C
Nos Matched Pair Mullard Cv378 (gz37) Rectifier Vacuum Tubes Tested I. 10277. C

Nos Matched Pair Mullard Cv378 (gz37) Rectifier Vacuum Tubes Tested I. 10277. C
NOS MATCHED PAIR MULLARD CV378 (GZ37).
Nos Matched Pair Mullard Cv378 (gz37) Rectifier Vacuum Tubes Tested I. 10277. C