2N282 semiconductor manufactured by Sylvania, listed as 2N282 (circa 1979).

2N189 semiconductor manufactured by Sylvania, listed as 2N189 (circa 1979).

2N112A semiconductor manufactured by Sylvania, listed as 2N112A (circa 1979).

2N543A semiconductor manufactured by Sylvania, listed as 2N543A (circa 1979).

2N462 semiconductor manufactured by Sylvania, listed as 2N462 (circa 1979).

2N376 semiconductor manufactured by Sylvania, listed as 2N376 (circa 1979).

2N281 semiconductor manufactured by Sylvania, listed as 2N281 (circa 1979).

2N188A semiconductor manufactured by Sylvania, listed as 2N188A (circa 1979).

2N112 semiconductor manufactured by Sylvania, listed as 2N112 (circa 1979).

2N543 semiconductor manufactured by Sylvania, listed as 2N543 (circa 1979).

2N461 semiconductor manufactured by Sylvania, listed as 2N461 (circa 1979).

2N375 semiconductor manufactured by Sylvania, listed as 2N375 (circa 1979).

2N280 semiconductor manufactured by Sylvania, listed as 2N280 (circa 1979).

2N188 semiconductor manufactured by Sylvania, listed as 2N188 (circa 1979).

2N542A semiconductor manufactured by Sylvania, listed as 2N542A (circa 1979).

2N460 semiconductor manufactured by Sylvania, listed as 2N460 (circa 1979).

2N374 semiconductor manufactured by Sylvania, listed as 2N374 (circa 1979).

2N279 semiconductor manufactured by Sylvania, listed as 2N279 (circa 1979).

2N187A semiconductor manufactured by Sylvania, listed as 2N187A (circa 1979).

2N542 semiconductor manufactured by Sylvania, listed as 2N542 (circa 1979).