Brand New, Matched Pairs RARE MINT NOS NIB JUNE-1957 Brimar CV1985 6SL7GTY Tubes. Halo Getter and Brown Micanol Base. STC Footscray production. From British Military Stock. One of the most desirable 6SL7 type tubes. Except for the getter style, tubes are identical sonically and electrically to the Square getter types from 1953-1957. Getter style was changed from Square to Halo in Mid-1957.
In these 1950s Micanol Base types, often tubes from the same date/batch can have slightly different shade of the base color. It is normal. Tested and matched on Top of the Line Calibrated
Hickok 580 Lab Grade Tester recently calibrated by late Chris Haedt. 65% = 1000 mmhos on this tester for 6SL7.
Matched Pair = $225.