2N6342 semiconductor manufactured by Sylvania, listed as 2N6342 (circa 1979).

2N6341 semiconductor manufactured by Sylvania, listed as 2N6341 (circa 1979).

2N6340 semiconductor manufactured by Sylvania, listed as 2N6340 (circa 1979).

2N6339 semiconductor manufactured by Sylvania, listed as 2N6339 (circa 1979).

2N6338 semiconductor manufactured by Sylvania, listed as 2N6338 (circa 1979).

2N6329 semiconductor manufactured by Sylvania, listed as 2N6329 (circa 1979).

2N6328 semiconductor manufactured by Sylvania, listed as 2N6328 (circa 1979).

2N6327 semiconductor manufactured by Sylvania, listed as 2N6327 (circa 1979).

2N6326 semiconductor manufactured by Sylvania, listed as 2N6326 (circa 1979).

2N6308 semiconductor manufactured by Sylvania, listed as 2N6308 (circa 1979).

2N6307 semiconductor manufactured by Sylvania, listed as 2N6307 (circa 1979).

2N6306 semiconductor manufactured by Sylvania, listed as 2N6306 (circa 1979).

2N6305 semiconductor manufactured by Sylvania, listed as 2N6305 (circa 1979).

2N6304 semiconductor manufactured by Sylvania, listed as 2N6304 (circa 1979).

2N6302 semiconductor manufactured by Sylvania, listed as 2N6302 (circa 1979).

2N6301 semiconductor manufactured by Sylvania, listed as 2N6301 (circa 1979).

2N6300 semiconductor manufactured by Sylvania, listed as 2N6300 (circa 1979).

2N6299 semiconductor manufactured by Sylvania, listed as 2N6299 (circa 1979).

2N6298 semiconductor manufactured by Sylvania, listed as 2N6298 (circa 1979).

2N6297 semiconductor manufactured by Sylvania, listed as 2N6297 (circa 1979).