(!!!) (BEST SINGLE) E81L=6686 Siemens made By Valvo, Hamburg, Germany NOS 1963 (22ma)
(!!) (PAIR) E81L=6686 Siemens made By Valvo, Hamburg, Germany NOS 1968 (13.4ma and 13.8ma)
(!!) (PAIR) E81L=6686 Siemens made By Valvo, Hamburg, Germany NOS 1968-1972 (18.4ma and 18.5ma)
(!) E81L=6686 Philips SQ made By Valvo, Hamburg, Germany NOS 1971 (16.6 and 17.4ma)
(PAIR) E81L=6686 Siemens East Germany NOS 1976 (20ma and 20.5ma)
E81L=6686 Valvo, Hamburg, Germany branded RCA NOS 1971 (2 in stock)
