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37 Raytheon NOS 1946 (7.3ma) (Highest mA)
37 RCA branded Philco used/good 1940's (6.4ma)
37 Sylvania branded Raytheon NOS 1948 (7.0ma)
374A Western Electric black plate used/good 1960's (18-21ma) (10 in stock)
374A Western Electric black plate used/good 1960's (18-21ma) (3 in stock)
374A Western Electric black plate used/good/65-70% 1960's (13-17ma) (15 in stock)
374A Western Electric gray plate used/good 1960's (17.2ma)
38 Sylvania NOS 1940's (8 in stock)
38 US Brands NOS (17 in stock)
38233=2C21 Raytheon ceramic base NOS 1930's
38233=2C21 Raytheon ceramic base NOS 1940's
38HE7=38HK7 GE NOS
39 Ken Rad engraved base NOS 1930's
39/44 US Brands NOS (18 in stock) ($1.99 each minimum 3 purchased)
39/44 used/good (10 in stock)
395A NOS (60 in stock)
395A Western Electric NOS
399B Western Electric used/good 1950's (3 in stock)
39A Arcturus Blue Balloon used/good tilted top cap 1930's
3A Western Electric photocell NOS in original box with 3A data sheet, tested 1939 on box
