2N4058 semiconductor manufactured by Sylvania, listed as 2N4058 (circa 1979).

2N4057 semiconductor manufactured by Sylvania, listed as 2N4057 (circa 1979).

2N4056 semiconductor manufactured by Sylvania, listed as 2N4056 (circa 1979).

2N4055 semiconductor manufactured by Sylvania, listed as 2N4055 (circa 1979).

2N4054 semiconductor manufactured by Sylvania, listed as 2N4054 (circa 1979).

2N4046 semiconductor manufactured by Sylvania, listed as 2N4046 (circa 1979).

2N4039 semiconductor manufactured by Sylvania, listed as 2N4039 (circa 1979).

2N4038 semiconductor manufactured by Sylvania, listed as 2N4038 (circa 1979).

2N4037 semiconductor manufactured by Sylvania, listed as 2N4037 (circa 1979).

2N4036 semiconductor manufactured by Sylvania, listed as 2N4036 (circa 1979).

2N4035 semiconductor manufactured by Sylvania, listed as 2N4035 (circa 1979).

2N4034 semiconductor manufactured by Sylvania, listed as 2N4034 (circa 1979).

2N4033 semiconductor manufactured by Sylvania, listed as 2N4033 (circa 1979).

2N4032 semiconductor manufactured by Sylvania, listed as 2N4032 (circa 1979).

2N4031 semiconductor manufactured by Sylvania, listed as 2N4031 (circa 1979).

2N4030 semiconductor manufactured by Sylvania, listed as 2N4030 (circa 1979).

2N4029 semiconductor manufactured by Sylvania, listed as 2N4029 (circa 1979).

2N4028 semiconductor manufactured by Sylvania, listed as 2N4028 (circa 1979).

2N4027 semiconductor manufactured by Sylvania, listed as 2N4027 (circa 1979).

2N4026 semiconductor manufactured by Sylvania, listed as 2N4026 (circa 1979).