(!!!!!) (BEST OVERALL PAIR) EL37 Mullard NOS black base and brown base gray plate same build NOS 1962-1966 (90.5ma and 91.5ma)
(!!!!) (Best Overall Single 1957) EL37 Mullard black plate NOS (2) upside-down cup-shape getter halos 1957 (74ma)
(!!!!) (Best Pair) EL37 Mullard branded Philips Miniwatt and Mullard test like new 1955-1957 (80ma and 81ma)
(!!!) (Recommended Single) EL37 Mullard brown base gray plate NOS 1966 excellent condition (78ma)
(!!) (Pre-1955) EL37 Mullard like new gray plate, 1 upside-down "trough shape" getter, made on or before 1955 (91ma)
(Good Value) EL37 Mullard brown base gray plate NOS 1960's double "O" getter halos (59ma)
