2N3964 semiconductor manufactured by Sylvania, listed as 2N3964 (circa 1979).

2N3963 semiconductor manufactured by Sylvania, listed as 2N3963 (circa 1979).

2N3962 semiconductor manufactured by Sylvania, listed as 2N3962 (circa 1979).

2N3948 semiconductor manufactured by Sylvania, listed as 2N3948 (circa 1979).

2N3947 semiconductor manufactured by Sylvania, listed as 2N3947 (circa 1979).

2N3933 semiconductor manufactured by Sylvania, listed as 2N3933 (circa 1979).

2N3932 semiconductor manufactured by Sylvania, listed as 2N3932 (circa 1979).

2N3931 semiconductor manufactured by Sylvania, listed as 2N3931 (circa 1979).

2N3930 semiconductor manufactured by Sylvania, listed as 2N3930 (circa 1979).

2N3924 semiconductor manufactured by Sylvania, listed as 2N3924 (circa 1979).

2N3923 semiconductor manufactured by Sylvania, listed as 2N3923 (circa 1979).

2N3920 semiconductor manufactured by Sylvania, listed as 2N3920 (circa 1979).

2N3919 semiconductor manufactured by Sylvania, listed as 2N3919 (circa 1979).

2N3915 semiconductor manufactured by Sylvania, listed as 2N3915 (circa 1979).

2N3914 semiconductor manufactured by Sylvania, listed as 2N3914 (circa 1979).

2N3906 semiconductor manufactured by Sylvania, listed as 2N3906 (circa 1979).

2N3905 semiconductor manufactured by Sylvania, listed as 2N3905 (circa 1979).

2N3904 semiconductor manufactured by Sylvania, listed as 2N3904 (circa 1979).

2N3903 semiconductor manufactured by Sylvania, listed as 2N3903 (circa 1979).

2N3902 semiconductor manufactured by Sylvania, listed as 2N3902 (circa 1979).