(!!!) (Best Pair) 12A Sylvania green leaf NOS 1940”s original boxes (7.5ma and 7.9ma)

1 pair) 12A Sylvania green leaf NOS 1940”s original boxes – tubes were factory sealed

1 tube) 7.5ma Gm=1700

1 tube) 7.9ma Gm=1700

Vplate = 180V

Vgrid = -13.5V

Good Ma = 6-7ma

Good Gm = 1600-1700