2N6358 semiconductor manufactured by Sylvania, listed as 2N6358 (circa 1979).

2N6357 semiconductor manufactured by Sylvania, listed as 2N6357 (circa 1979).

2N6356 semiconductor manufactured by Sylvania, listed as 2N6356 (circa 1979).

2N6355 semiconductor manufactured by Sylvania, listed as 2N6355 (circa 1979).

2N6354 semiconductor manufactured by Sylvania, listed as 2N6354 (circa 1979).

2N6349A semiconductor manufactured by Sylvania, listed as 2N6349A (circa 1979).

2N6349 semiconductor manufactured by Sylvania, listed as 2N6349 (circa 1979).

2N6348A semiconductor manufactured by Sylvania, listed as 2N6348A (circa 1979).

2N6348 semiconductor manufactured by Sylvania, listed as 2N6348 (circa 1979).

2N6347A semiconductor manufactured by Sylvania, listed as 2N6347A (circa 1979).

2N6347 semiconductor manufactured by Sylvania, listed as 2N6347 (circa 1979).

2N6346A semiconductor manufactured by Sylvania, listed as 2N6346A (circa 1979).

2N6346 semiconductor manufactured by Sylvania, listed as 2N6346 (circa 1979).

2N6345A semiconductor manufactured by Sylvania, listed as 2N6345A (circa 1979).

2N6345 semiconductor manufactured by Sylvania, listed as 2N6345 (circa 1979).

2N6344A semiconductor manufactured by Sylvania, listed as 2N6344A (circa 1979).

2N6344 semiconductor manufactured by Sylvania, listed as 2N6344 (circa 1979).

2N6343A semiconductor manufactured by Sylvania, listed as 2N6343A (circa 1979).

2N6343 semiconductor manufactured by Sylvania, listed as 2N6343 (circa 1979).

2N6342A semiconductor manufactured by Sylvania, listed as 2N6342A (circa 1979).