(!!!!) (Good Value Pair) JAN-12AT7WC Philips by Sylvania black plates NOS 1981-1982 (6.8/6.8ma and 7.0/7.2ma)

1 low noise pair) JAN-12AT7WC Philips by Sylvania black plates NOS 1981-1982

1 tube) 6.8/6.8ma Gm=4300/4500 

1 tube) 7.0/7.2ma Gm=4800/4600 

Matched on Amplitrex

Good Ma range 7-10ma

Good Gm range 4500-5500