2N3792 semiconductor manufactured by Sylvania, listed as 2N3792 (circa 1979).

2N3791 semiconductor manufactured by Sylvania, listed as 2N3791 (circa 1979).

2N3790 semiconductor manufactured by Sylvania, listed as 2N3790 (circa 1979).

2N3789 semiconductor manufactured by Sylvania, listed as 2N3789 (circa 1979).

2N3785 semiconductor manufactured by Sylvania, listed as 2N3785 (circa 1979).

2N3784 semiconductor manufactured by Sylvania, listed as 2N3784 (circa 1979).

2N3783 semiconductor manufactured by Sylvania, listed as 2N3783 (circa 1979).

2N3782 semiconductor manufactured by Sylvania, listed as 2N3782 (circa 1979).

2N3781 semiconductor manufactured by Sylvania, listed as 2N3781 (circa 1979).

2N3780 semiconductor manufactured by Sylvania, listed as 2N3780 (circa 1979).

2N3779 semiconductor manufactured by Sylvania, listed as 2N3779 (circa 1979).

2N3778 semiconductor manufactured by Sylvania, listed as 2N3778 (circa 1979).

2N3776 semiconductor manufactured by Sylvania, listed as 2N3776 (circa 1979).

2N3775 semiconductor manufactured by Sylvania, listed as 2N3775 (circa 1979).

2N3774 semiconductor manufactured by Sylvania, listed as 2N3774 (circa 1979).

2N3773 semiconductor manufactured by Sylvania, listed as 2N3773 (circa 1979).

2N3772C semiconductor manufactured by Sylvania, listed as 2N3772C (circa 1979).

2N3772 semiconductor manufactured by Sylvania, listed as 2N3772 (circa 1979).

2N3771 semiconductor manufactured by Sylvania, listed as 2N3771 (circa 1979).

2N3770 semiconductor manufactured by Sylvania, listed as 2N3770 (circa 1979).