(!!) (Recommended Pair) 30 Sylvania like new – same plates – different shape top mica (2.7ma and 2.9ma)

1 pair) 30 Sylvania used/very good – same plates – different shape top mica
1 tube) 2.9ma Gm=800 (Sylvania 1940”s)
1 tube) 2.7ma Gm=800 (Sylvania branded Philco 1946)