1940's Mullard Sheild Tupe 12AT7 ECC81 Audio Tube Tested at 79/78 min 55
1940's Mullard Sheild Tupe 12AT7 ECC81 Audio Tube. Great Britain. 1940, 40s, 1950, 50s, 1960, 60s, 1970, 70s. Tube(s) shown in pictures will be the exact tube(s) you will receive.