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UX-201-A Radiotron used/good 1930 era (2.4ma Gm=550)
UX-201-A RCA Radiotron Balloon tests like new 1930's (read review)
UX-226 RCA Radiotron balloon used/good 1920's (3.7ma Gm=900)
UY-224 RCA Balloon used/good 1930's (37/25) (3.0ma Gm=700)
UY-224 RCA Balloon used/tests like new 1930's rattle inside base (50/25) (4.2ma Gm=1000)
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 Sylvania round plate NOS 1940's (8.6ma)
