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(!!!) (Best RCA single #2) 5687 RCA bronze plates NOS 1976 (31.5/34ma)
(!) 5687 RCA black plates used/good 1961 (33/33.5ma)
(!) 5687 Raytheon part bronze part black plates used/tests like new 1960 (33/38ma)
(slightly microphonic - good value) 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm)
(!!) (Best Value Single) JAN-CRP-5687 Raytheon black plates used/very good around 1960 (33.5/37.6ma)
(!!!!!) (Best Overall Single) CK-5687WB Raytheon black plates NOS 1960's (40.5ma/42ma) (Audio Note, Modwright, Manley) Highest mA and Gm
(!!!!!) (Best Pair #2) 5687WA and 5687WB GE black plates like new 1970's (39/38.5ma and 37/41ma) (Highest Ma and Gm)
(!!!) (Best Raytheon Pair #4) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (31/32ma and 32/31ma) 1-3% matched
5687WA GE used/tests like new 1970's (44/45ma) (highest Ma and Gm)
(!!!!) (Best Single #2) 5687WA Sylvania NOS 1960's (34/35ma) (Same Gm)
(!!!) (Best Raytheon Pair #2) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (36.5/35.0ma and 38.5/35.5ma) 1-3% matched
(!!!!!) (Best Overall Pair) 5687 GE "5-Star" NOS 1973 (35/34.5ma and 36/34.5ma) 1-3% matched (Audio Note, Manley, Modwright)
(!!) (Best Value Single) JAN-5687WA Raytheon bronze plates used/tests like new 1969 (41.5/43.5ma) (High Ma and Gm)
(!!!!) (Best Single) JHS-5687WA Sylvania NOS 1966 (46/48ma) (Highest Ma and Gm)
(!!!) (Best Raytheon Pair #1) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (35.0/34.6ma and 34.5/35.0ma) 1-2% matched
(!!!) (Best Pair) JRP-5687WA and JAN-5687WA Raytheon bronze plates tests like new 1964 era faded printing (33.4/36.4ma and 33.5/33.0ma)
(!!!!) (BEST PAIR #1) CK-5687WB Raytheon black plates 1960's (Audio Note, Manley, Modwright) (33/34ma and 33/34.2ma) 1-2% matched
(!!!!) (BEST GE PAIR #2) 5687WB GE NOS rebranded CK-5687WB Raytheon black plates with hint of bronze 1970's (Audio Note, Manley, Modwright, Audion) (36.8/37.4ma and 36.6/35.8ma)
(!!!!) (Best Single) JAN-5687WB GE NOS 1972 (34.6/35.6ma)
(!!!!) (Best Single) JAN-5687WA Sylvania NOS 1967 (38/39ma) (Highest Ma and Gm)
