(!!!) (Recommended Single) 127 Arcturus Blue Balloon used/good 1930 era in white box (4.3ma)

1 tube) 127 Arcturus Blue Balloon used/good 1930 era in white box

4.3ma

Gm=800

Tested on Amplitrex

Vplate=250V

Vgriod=-21V

NOS Ma = 4-5ma

NOS Gm=800-900