2N2401 semiconductor manufactured by Sylvania, listed as 2N2401 (circa 1979).

2N2400 semiconductor manufactured by Sylvania, listed as 2N2400 (circa 1979).

2N2399 semiconductor manufactured by Sylvania, listed as 2N2399 (circa 1979).

2N2398 semiconductor manufactured by Sylvania, listed as 2N2398 (circa 1979).

2N2397 semiconductor manufactured by Sylvania, listed as 2N2397 (circa 1979).

2N2396 semiconductor manufactured by Sylvania, listed as 2N2396 (circa 1979).

2N2395 semiconductor manufactured by Sylvania, listed as 2N2395 (circa 1979).

2N2394 semiconductor manufactured by Sylvania, listed as 2N2394 (circa 1979).

2N2393 semiconductor manufactured by Sylvania, listed as 2N2393 (circa 1979).

2N2390 semiconductor manufactured by Sylvania, listed as 2N2390 (circa 1979).

2N2389 semiconductor manufactured by Sylvania, listed as 2N2389 (circa 1979).

2N2386A semiconductor manufactured by Sylvania, listed as 2N2386A (circa 1979).

2N2386 semiconductor manufactured by Sylvania, listed as 2N2386 (circa 1979).

2N2382 semiconductor manufactured by Sylvania, listed as 2N2382 (circa 1979).

2N2381 semiconductor manufactured by Sylvania, listed as 2N2381 (circa 1979).

2N2378 semiconductor manufactured by Sylvania, listed as 2N2378 (circa 1979).

2N2377 semiconductor manufactured by Sylvania, listed as 2N2377 (circa 1979).

2N2376 semiconductor manufactured by Sylvania, listed as 2N2376 (circa 1979).

2N2375 semiconductor manufactured by Sylvania, listed as 2N2375 (circa 1979).

2N2374 semiconductor manufactured by Sylvania, listed as 2N2374 (circa 1979).