(!!!) (Recommended Pair) JAN-1619=VT-164 RCA NOS 1943 some surface rust on metal cans (55ma and 57ma)

1 matched pair) JAN-1619 RCA NOS 1943 some rust on metal cans due to age

1 tube) 55ma Gm=5000

1 tube) 57ma Gm=5100

Good Ma=44-55ma

Good Gm=4000-5000

2.5 Volt filament

15 watts