(!) 5998 Tungsol branded IBM black plates used/good 1961 in white box (62ma/68ma) Title: 5998 Tungsol

5998 Tungsol branded IBM black plates used/good 1961 in white box

1 section) 62ma Gm=9100

1 section) 68ma Gm=10,200

Good Ma range 60-80ma

Good Gm range 10,000 – 12,000