(!) (PAIR) 6D6 RCA Cunningham used/good 1930's (62/40 and 62/40)
(1 set of 4 tubes) 6D6 Mixed US Brands used/good 1930's - 1940's (set of 4)
6D6 Ken Rad NOS 1940's hairline crack in base
6D6 RCA Cunningham used/tests like new 1930's (73/40)
6D6 Sylvania NOS 1940's (2 in stock)
6D6 Sylvania NOS small 1/8" glass chip inside tube at bottom
6D6 US Brands used/good (2 for $8)
