UY-224A Champion Balloon used/very good 1930's (46/25)
UY-224A RCA Balloon used/very good 1930's (41/25) (2.6ma Gm=900)
VF14 or VF14M Telefunken NOS
VT-135=12J5GT RCA NOS 1940's (6.0ma)
VT-135=12J5GT Sylvania round plate NOS 1940's (11.2ma Gm=3000)
