485 Sylvania used/good 1930's no printing (7.9ma)
(!!!) (BEST PAIR) 485 National Radio tube engraved base mesh-plate NOS 1930's (6.0ma and 6.4ma) (variant of 27)
485 National mesh-plate NOS 1940's (6.7ma)
485 Sylvania NOS 1940's (5.5ma)
(!!!!) (3rd Best Pair) 27 Philco by Sylvania NOS 1940's (6.0ma and 6.1ma) 1-2% matched
(!!!!) (Recommended Pair) 27 Philco by Sylvania NOS 1940's (5.5ma and 5.3ma)
(!!!!) (Best Pair) 27 Philco by Sylvania NOS 1940's (6.3ma and 6.3ma) 1% matched
(!!) (Best Single) 27 Philco by Sylvania NOS 1940's (8ma)