Batch of 4 USED Tubes ECC81 12AT7 1960s Mullard Blackburn and Mitcham Production. Mullard Old Shield BVA and CV Logos. Labels are fragile and not perfect as it was common with tubes from that era.

These 1960s Mullard tubes are more desirable tubes than the late production 1980s CV4024 and M8162.

Tested and matched on Top of the Line Calibrated Hickok 580 Lab Grade Tester recently calibrated by late Chris Haedt. 65% = 3500 mmhos for 12AT7 on this tester.

Tube 1-4 from left in the picture:
1966 Mullard Blackburn Old Shield BVA Logo ECC81 4900-4600 mmhos.
1967 Mullard Blackburn Old Shield BVA Logo ECC81 6600-6500 mmhos.
1967 Mullard Blackburn CV455 Label 5400-4500 mmhos.
Early 1960s Mullard Mitcham Wrinkle Glass Old Shield BVA Logo 6400-4300 mmhos.

$70 this Batch of 4 tubes as shown.

• Batch of 4 USED Tubes ECC81 12AT7 1960s Mullard Blackburn and Mitcham Production. Mullard Old Shield BVA and CV Logos.