(!!) (#1 10 RCA Pair) VT-25=10 RCA NOS 1940's some marks on base - reboxed (27.6ma and 27.8ma)
(!!) (#1 10Y PAIR) 10Y=VT-25 SYLVANIA NOS 1940's in white boxes (25.5ma and 26ma)
(!!) (#1 pair) VT-25-A Hytron made for Western Electric NOS 1940's (33.5ma and 39ma)
(!) (#1 10 engraved base pair) 10 Sylvania "engraved base" 1930's used/good same build (21.5ma and 22.5ma)
10 Sylvania NOS ceramic base 1940's (26ma)
10=VT-25 Sylvania NOS 1940's (27ma)
