(!) JG-12AT7WA=6201 GE black plates triple mica “”U”” getter used/strong 1955 (10ma/15ma)

1 low noise tube) JG-12AT7WA=6201 GE black plates triple mica “”U”” getter used/good 1955 faded printing

10ma Gm=5800

15ma Gm=6700