(!!!) (Best Value Single) 6201=12AT7 GE Hewlett Packard NOS 1968 (8.2/9.6ma)
(!!) (Recommended Single) JG-5751 GE gray plates double mica "O" getter NOS 1965 (2.1/2.1ma)
(!) JG-6203 GE used/tests like new 1963 (52/40 and 53/40)
JG-6BH6 GE NOS 1961 (9.4ma)