2N3767 semiconductor manufactured by Sylvania, listed as 2N3767 (circa 1979).

2N3766 semiconductor manufactured by Sylvania, listed as 2N3766 (circa 1979).

2N3765 semiconductor manufactured by Sylvania, listed as 2N3765 (circa 1979).

2N3764 semiconductor manufactured by Sylvania, listed as 2N3764 (circa 1979).

2N3763 semiconductor manufactured by Sylvania, listed as 2N3763 (circa 1979).

2N3762 semiconductor manufactured by Sylvania, listed as 2N3762 (circa 1979).

2N3753 semiconductor manufactured by Sylvania, listed as 2N3753 (circa 1979).

2N3743 semiconductor manufactured by Sylvania, listed as 2N3743 (circa 1979).

2N3742 semiconductor manufactured by Sylvania, listed as 2N3742 (circa 1979).

2N3741A semiconductor manufactured by Sylvania, listed as 2N3741A (circa 1979).

2N3741 semiconductor manufactured by Sylvania, listed as 2N3741 (circa 1979).

2N3739 semiconductor manufactured by Sylvania, listed as 2N3739 (circa 1979).

2N3738 semiconductor manufactured by Sylvania, listed as 2N3738 (circa 1979).

2N3732 semiconductor manufactured by Sylvania, listed as 2N3732 (circa 1979).

2N3731 semiconductor manufactured by Sylvania, listed as 2N3731 (circa 1979).

2N3730 semiconductor manufactured by Sylvania, listed as 2N3730 (circa 1979).

2N3723 semiconductor manufactured by Sylvania, listed as 2N3723 (circa 1979).

2N3721 semiconductor manufactured by Sylvania, listed as 2N3721 (circa 1979).

2N3720 semiconductor manufactured by Sylvania, listed as 2N3720 (circa 1979).

2N3719 semiconductor manufactured by Sylvania, listed as 2N3719 (circa 1979).