0A3 Westinghouse NOS 1940's - 1950's small crack in base (neon)
0D3 RCA used/good 1954 (argon)
10 Raytheon NOS 1940's (24ma)
101L Western Electric top printing 1940-1945 used (4.1ma Gm=800)
102D Western Electric NOS 1954 large getter (0.7ma Gm=600)
10=VT-25 Sylvania branded Tungsol like new 1940's (26.2ma)
10=VT-25 Sylvania NOS 1940's (25ma)
12SK7GT RCA NOS 1940's (8.6ma)
12SK7GT RCA NOS 1940's (9.0ma)
12SK7GT RCA NOS 1940's (9.2ma)
12SK7GT Rogers Canada used/tests like new 1950's slightly tilted glass (8.8ma)
12SK7GT Sylvania branded Westinghouse chrome top NOS 1955 (8.5ma)
12SK7GT Tungsol used/tests like new 1940's, 50% of base is rusted/tarnished (8.6ma)
12SK7GT Wizard by Sylvania used/good 1940's (7.5ma)
12SK7Y GE NOS 1957 (9.6ma)
1608 RCA white ceramic base NOS in white box 1940 era (32.5ma)
1614 RCA used/very good 1961 surface oxidation / rust on metal can (67ma)
1625 National Union like new 1940's no printing in white box (72/40)
1625 National Union like new 1940's no printing in white box (85/40)
1625=VT-136 National Union used/good mid-1940's (69/40)
