NOTES:  Orphans from various lots.

Brand New, MINT NOS 1950s-60s Brimar CV4024 12AT7WA  and 12AT7 tubes with Black Plates and copper posts. STC Production, Made in England. Very desirable 12AT7/ECC81 type tube for both Audio and Guitar applications. 

Tested and matched on Hickok 752, just recently calibrated and modified by Hickok expert to all Solid State to eliminate drift. However, on average 12AT7 measures lower on this 752 than it should.

For comparison, 12AT7 measuring 4400-4400 on calibrated Hickok 600 measures 3300-3300 mmhos on this 752. Average new 12AT7 on Hickok 600 is 4000 mmhos. In other words, actual test scores are higher than what we have noted on the tube boxes.

NOTE: Specify which tube you want in the comments box during checkout process. Shown from left:
Tube 1: Brimar CV4024 12AT7WA MINT NOS NIB 1969 Black Plate Military Stock - 3800-4100 mmhos.

Tube 2: Brimar BVA 12AT7 MINT NOS 1950s Black Plates Square Getter - 2850-3100 mmhos. Packed in generic white box from bulk.

Single Tube = $40.