6L6 RCA metal can used/like new 1953 (71ma)

1 tube) JAN-CRC-6L6Y metal can used/test like new 1953:

71ma

Gm=5850

Y= brown bottom

NOS Ma = 70-72ma

Good Ma range 60-70ma

Good Gm range 5500-6000

– Gates SA-39B compressor 1958
– Fender Twin Reverb UltraLinear 1981