(!!) (Best Matched Pair) 30 Sylvania NOS – same plates – different shape top mica 1945-1946 (3.2ma and 3.1ma) 1-2% matched

1 pair) 30 Sylvania NOS – same plates – different shape top mica – best value
1 tube) 3.1ma Gm=800 Type JAN-CHS-30 (1945)
1 tube) 3.2ma Gm=800 Type 30 (1946)

Matched on Amplitrex