For your consideration I have 6 matched pairs of vintage 1948 Sylvania JAN 6SL7 WGT tubes.All have been tested and fall within the range of 1900 to 1950 whereas 2000 is new.Designed for military application they have brown micanol bases,short glass envelopes and chrome tops. Becoming increasingly rare,current dealer pricing averages $80 a pair.Offered at $45 a pair,or $80 a quad shipping included in CONUS.I would invite you to check my audiogon feedback under my user name.Will accept USPS money order,certified bank draft,personal check or paypal plus 4%.
