2N3400 semiconductor manufactured by Sylvania, listed as 2N3400 (circa 1979).

2N3399 semiconductor manufactured by Sylvania, listed as 2N3399 (circa 1979).

2N3398 semiconductor manufactured by Sylvania, listed as 2N3398 (circa 1979).

2N3397 semiconductor manufactured by Sylvania, listed as 2N3397 (circa 1979).

2N3396 semiconductor manufactured by Sylvania, listed as 2N3396 (circa 1979).

2N3395 semiconductor manufactured by Sylvania, listed as 2N3395 (circa 1979).

2N3394 semiconductor manufactured by Sylvania, listed as 2N3394 (circa 1979).

2N3393 semiconductor manufactured by Sylvania, listed as 2N3393 (circa 1979).

2N3392 semiconductor manufactured by Sylvania, listed as 2N3392 (circa 1979).

2N3391A semiconductor manufactured by Sylvania, listed as 2N3391A (circa 1979).

2N3391 semiconductor manufactured by Sylvania, listed as 2N3391 (circa 1979).

2N3390 semiconductor manufactured by Sylvania, listed as 2N3390 (circa 1979).

2N3389 semiconductor manufactured by Sylvania, listed as 2N3389 (circa 1979).

2N3388 semiconductor manufactured by Sylvania, listed as 2N3388 (circa 1979).

2N3379 semiconductor manufactured by Sylvania, listed as 2N3379 (circa 1979).

2N3378 semiconductor manufactured by Sylvania, listed as 2N3378 (circa 1979).

2N3377 semiconductor manufactured by Sylvania, listed as 2N3377 (circa 1979).

2N3376 semiconductor manufactured by Sylvania, listed as 2N3376 (circa 1979).

2N3371 semiconductor manufactured by Sylvania, listed as 2N3371 (circa 1979).

2N3346 semiconductor manufactured by Sylvania, listed as 2N3346 (circa 1979).