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(!!!!) (Best Pair #1) 01A Cunningham NOS 1940 era boxes were factory sealed (4.0ma and 3.9ma) (same Gm)
(!!!!) (Best Pair #2) 01A Cunningham NOS 1940 era boxes were factory sealed (3.3ma and 3.2ma) (close Gm)
(!!!!) (Best Pair #2) 01A Cunningham NOS 1940 era boxes were factory sealed (3.7ma and 3.6ma) (Same Gm)
(!!!!) (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm)
(!!!) 201A Silvertone Balloon NOS 1930 era (1.8ma and Gm=500)
UX-201-A RCA Radiotron Balloon tests like new 1930's (read review)
