3 Sylvania 6R7 6R7GT Vacuum Tubes NOS NIB Lot Of Three Matched Pair 12B4 Tube One measured 63/65 and

Tube One measured 63/65 and Tube Two measured 66/64 where minimum (65%) is 50/50

2370 micromhos and 20

new in box Westinghouse 6S4A tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box milspec black plate GE JAN-6Y6GT / JAN-CG-6Y6GT tubes tested to spec on our Paul Hart-calibrated TV7/U

3 Sylvania 6R7 6R7GT Vacuum Tubes NOS NIB Lot Of Three Matched Pair 12B4 Tube One measured 63/65 andThis lot of three new old stock, new in box Sylvania MANUFACTURED, GM LABELED 6R7GT tubes tested to spec on our Paul Hart calibrated TV7 U, testing to spec. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP