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01A National Union NOS 1940's (3.1ma)
01A Raytheon 4-Pillar box plate NOS 1930's (2.8ma)
01A Wards by Sylvania used/good 1940's (2.6ma Gm=700)
UV-202 Radiotron "brass base" and tipped NOS original box 1920 era (45ma) (very rare)
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)
