(!!!) (Recommended Pair) E283CC Siemens Germany NOS original boxes 1974 (1.1/1.2ma and 1.2/1.3ma Gm=1500/1600 and 1600/1700)
(!) E283CC Siemens Germany triple mica used/like new 1977 (Gm=1700/1800)
E283CC Siemens triple mica NOS 1977 (Gm=1500/1700) (pin #4 shorter than other pins)
