(!!!!) (Best Pair) 10 Sylvania "engraved base" 1930's NOS same build (24ma and 27ma)
(!!!) (Best Single) 10=VT-25 Sylvania NOS 1940's (27.8ma)
(!!) (Best Single) 10=VT-25 SYLVANIA branded GE NOS 1940's in white box (27.3ma)
(!!) (Best Single) 10Y=VT-25 SYLVANIA NOS 1940's in white box (27.5ma)
(!!) 10=VT-25 RCA NOS 1940's (23.5ma)
10 Raytheon NOS 1940's (24ma)
410 Deforest Audio Balloon engraved base NOS original box 1930 era (32.6ma)
