Brand New, MINT NOS Rare 1950s Brimar Black Plate Square Getter 12AT7 ECC81 tubes with copper posts. Tubes have RTC label. Same Brimar etched code 5F6/565 on all tubes. Made in England. Repacked in white boxes from the 100 pcs bulk box. Very desirable 12AT7/ECC81 type tube for both Audio and Guitar applications.
Tested and matched on Top of the Line Calibrated
Hickok 580 Lab Grade Tester. 100% is roughly 5500 mmhos on this tester for 12AT7.
Single Tube = $45. Select 2 Tubes for a Matched Pair and 4 for a Matched Quad.
