8417 Sylvania branded Bogen used/tests like new 1960's (102.2ma)
8417 Sylvania branded GE used/good 1970's (87ma)
8417 Sylvania branded GE used/good 1970's (92.6ma)
8417 Sylvania branded RCA used/good 1970 (90ma)
8417 Sylvania used/good 1970 era no printing (92ma)
KT66 GEC UK brown base used/70% 1966 (64ma)