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(!!!) (Best Pair) 6AN8A RCA Motorola NOS 1973 (17.6/14.6ma and 16.5/15.6ma)
(!!!) (BEST PAIR) 6AN8A RCA NOS 1968 (16.2/15.6ma and 16.5/13.4ma) (close Gm matching)
(!!!) (BEST PAIR) 6AU5GT GE gray plates NOS 1960's (75ma and 74ma)
(!!!) (Best Pair) 6AU6A Channel Master Hitachi Japan NOS D getter 1960 (8.6ma and 9.2ma)
(!!!) (BEST PAIR) 6CA4 RCA NOS 1969-1970's (52/40 and 53/40 x 2 tubes)
(!!!) (Best Pair) 6CS7 RCA gray plates NOS 1970 era (20/10.6ma and 21/12.2ma)
(!!!) (Best Pair) 6F6GT GE coated glass NOS 1951-1952 (36ma and 39.5ma)
(!!!) (Best Pair) 6F6GT Sylvania and Sylvania Philco NOS 1950-1952 (40ma and 41.5ma) (close Gm)
(!!!) (Best Pair) 6F6GT Sylvania branded GE NOS 1962-1964 (39.5ma and 41ma) (close Gm)
(!!!) (BEST PAIR) 6JB6A RCA branded GE NOS 1960's (80ma and 86ma)
(!!!) (Best Pair) 6K6GT GE black plate D getter NOS 1957-1959 (53.5ma and 54ma)
(!!!) (BEST PAIR) 6K6GT Sylvania coated glass NOS 1940's (1) branded Philco (44ma and 44.6ma)
(!!!) (Best Pair) 6SC7 GE metal can NOS 1953-1955 (2.3/1.9ma and 2.3/2.1ma)
(!!!) (Best Pair) 6V6 Sylvania metal can NOS 1970 era (37.0ma and 37.5ma) 1-2% matched
(!!!) (BEST PAIR) 809 RCA ceramic base like new 1940 era (68/42 and 70/42)
(!!!) (Best Pair) 81 ST-19 RCA NOS original boxes 1940's (1 pair)
(!!!) (Best Pair) 8417 Sylvania branded RCA NOS 1960's - 1970 (106ma and 108ma)
(!!!) (Best Pair) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10.2ma and 10.6ma)
(!!!) (BEST PAIR) JAN-CYS-1616=1616 Sperti, Inc. NOS made by RCA 1944 (Space Tech Labs power supply STR-104)
(!!!) (Best Pair) JRC-5751 RCA NOS black plates double mica 1962 (2.7/2.3ma and 2.7/2.9ma) (similar to Command Series)
