4B
NPN GERMAINUM TRANSISTOR - Utilizing Bell Labs 1950's grown technology - 1958 DATE CODE - USED FOR Early Voice Systems & Telephone Equipment - Sourced from transistor engineer that worked at Western Electric over in Allentown, PA
BILL44BJ
NPN GERMAINUM TRANSISTOR - Utilizing Bell Labs 1950's grown technology - 1958 DATE CODE - USED FOR Early Voice Systems & Telephone Equipment - Sourced from transistor engineer that worked at Western Electric over in Allentown, PA