4-65A=8165
40KG6A=PL519 JAPAN branded RCA tall bottle clear top NOS (1 in stock)
40KV DC (40,000) High Voltage Wire NOS (3 feet) (for 805 power tubes)
41 Ken Rad NOS 1950 (70/40)
41=VT-48 Hytron NOS 1940's (80/40)
41=VT-48 Tungsol NOS 1940's (80/40)
42 National Union used/tests like new 1930's (35ma)
42 Philco balloon engraved base used/good 1930 era (31ma)
42 Raytheon engraved base used/tests like new 1930's (33ma)
42 Tungsol used/good 1940's (30ma)
4212E=212E STC England
421A Western Electric (sold out)
421A Western Electric NOS 1984 (sold - read review)
42KN6 RCA Double-Plate NOS faded printing
42KN6 Sylvania branded Raytheon NOS
43 GE NOS 1950 era (3 in stock)
43 National Union NOS 1950 era (3 in stock)
43 National Union NOS 1950 era (75/58)
43 Raytheon NOS 1947 (2 in stock)
43 Sylvania NOS 1947 (71/58)
