6SL7GT RCA VT-229 JAN NOS Platinum Matched Pair Gray coated, the same dates 1956

One platinum matched pair (2 tubes) RARE 6SL7GT RCA VT-229 JAN NOS Gray coated

The same date codes (1956), carefully tested on calibrated tester with 250V on anodes and -1.5V on grids: (4.5/4.6mA) (4.3/4.6mA)