2N2067 semiconductor manufactured by Sylvania, listed as 2N2067 (circa 1979).

2N2066A semiconductor manufactured by Sylvania, listed as 2N2066A (circa 1979).

2N2066 semiconductor manufactured by Sylvania, listed as 2N2066 (circa 1979).

2N2065A semiconductor manufactured by Sylvania, listed as 2N2065A (circa 1979).

2N2065 semiconductor manufactured by Sylvania, listed as 2N2065 (circa 1979).

2N2064A semiconductor manufactured by Sylvania, listed as 2N2064A (circa 1979).

2N2064 semiconductor manufactured by Sylvania, listed as 2N2064 (circa 1979).

2N2063A semiconductor manufactured by Sylvania, listed as 2N2063A (circa 1979).

2N2063 semiconductor manufactured by Sylvania, listed as 2N2063 (circa 1979).

2N2062A semiconductor manufactured by Sylvania, listed as 2N2062A (circa 1979).

2N2062 semiconductor manufactured by Sylvania, listed as 2N2062 (circa 1979).

2N2061A semiconductor manufactured by Sylvania, listed as 2N2061A (circa 1979).

2N2061 semiconductor manufactured by Sylvania, listed as 2N2061 (circa 1979).

2N2059 semiconductor manufactured by Sylvania, listed as 2N2059 (circa 1979).

2N2049 semiconductor manufactured by Sylvania, listed as 2N2049 (circa 1979).

2N2048A semiconductor manufactured by Sylvania, listed as 2N2048A (circa 1979).

2N2048 semiconductor manufactured by Sylvania, listed as 2N2048 (circa 1979).

2N2041 semiconductor manufactured by Sylvania, listed as 2N2041 (circa 1979).

2N2040 semiconductor manufactured by Sylvania, listed as 2N2040 (circa 1979).

2N2039 semiconductor manufactured by Sylvania, listed as 2N2039 (circa 1979).