UV-202 Radiotron "brass base" and tipped NOS original box 1920 era (45ma) (very rare)
(DISPLAY TUBE) UV-201-A Radiotron "brass base and tipped" 1920's (does not work - display tube)
(!!!!) (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm)
