3N143 semiconductor manufactured by Sylvania, listed as 3N143 (circa 1979).

3N142 semiconductor manufactured by Sylvania, listed as 3N142 (circa 1979).

3N140 semiconductor manufactured by Sylvania, listed as 3N140 (circa 1979).

3N128 semiconductor manufactured by Sylvania, listed as 3N128 (circa 1979).

3N113 semiconductor manufactured by Sylvania, listed as 3N113 (circa 1979).

3N112 semiconductor manufactured by Sylvania, listed as 3N112 (circa 1979).

2N6576 semiconductor manufactured by Sylvania, listed as 2N6576 (circa 1979).

2N6575 semiconductor manufactured by Sylvania, listed as 2N6575 (circa 1979).

2N6574 semiconductor manufactured by Sylvania, listed as 2N6574 (circa 1979).

2N6573 semiconductor manufactured by Sylvania, listed as 2N6573 (circa 1979).

2N6569 semiconductor manufactured by Sylvania, listed as 2N6569 (circa 1979).

2N6558 semiconductor manufactured by Sylvania, listed as 2N6558 (circa 1979).

2N6544 semiconductor manufactured by Sylvania, listed as 2N6544 (circa 1979).

2N6543 semiconductor manufactured by Sylvania, listed as 2N6543 (circa 1979).

2N6542 semiconductor manufactured by Sylvania, listed as 2N6542 (circa 1979).

2N6514 semiconductor manufactured by Sylvania, listed as 2N6514 (circa 1979).

2N6513 semiconductor manufactured by Sylvania, listed as 2N6513 (circa 1979).

2N6512 semiconductor manufactured by Sylvania, listed as 2N6512 (circa 1979).

2N6511 semiconductor manufactured by Sylvania, listed as 2N6511 (circa 1979).

2N6510 semiconductor manufactured by Sylvania, listed as 2N6510 (circa 1979).