(!!) (#1 37 Pair) 37 RCA like new 1940's (7.7ma and 7.8ma) 1% matched
(!!) (#1 37 Pair) 37 RCA NOS 1940's (7.3ma and 7.5ma)
(!!) (#1 37 Pair) 37 RCA NOS 1940's (8.5ma and 8.5ma) 1% matched
(!) (Pair) 37 Tungsol engraved base 1930's used/test strong (6.8ma and 7.6ma)
37 GE NOS 1946 (7.3ma)
37 GE ribbed plate NOS 1943 (8.0ma)
37 Raytheon NOS 1946 (7.3ma)
37 RCA branded Philco used/good 1940's (6.4ma)
37 RCA Cunningham engraved base like new 1930's (8.3ma)
37 Sylvania branded Raytheon NOS 1948 (7.0ma)
