(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.1ma and 3.1ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.2ma and 3.2ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.4ma and 3.4ma)
864=VT-24 Hytron USA NOS 1940's (3.4ma)