2N2488 semiconductor manufactured by Sylvania, listed as 2N2488 (circa 1979).

2N2487 semiconductor manufactured by Sylvania, listed as 2N2487 (circa 1979).

2N2484 semiconductor manufactured by Sylvania, listed as 2N2484 (circa 1979).

2N2483 semiconductor manufactured by Sylvania, listed as 2N2483 (circa 1979).

2N2482 semiconductor manufactured by Sylvania, listed as 2N2482 (circa 1979).

2N2481 semiconductor manufactured by Sylvania, listed as 2N2481 (circa 1979).

2N2477 semiconductor manufactured by Sylvania, listed as 2N2477 (circa 1979).

2N2476 semiconductor manufactured by Sylvania, listed as 2N2476 (circa 1979).

2N2469 semiconductor manufactured by Sylvania, listed as 2N2469 (circa 1979).

2N2468 semiconductor manufactured by Sylvania, listed as 2N2468 (circa 1979).

2N2466 semiconductor manufactured by Sylvania, listed as 2N2466 (circa 1979).

2N2456 semiconductor manufactured by Sylvania, listed as 2N2456 (circa 1979).

2N2455 semiconductor manufactured by Sylvania, listed as 2N2455 (circa 1979).

2N2454 semiconductor manufactured by Sylvania, listed as 2N2454 (circa 1979).

2N2450 semiconductor manufactured by Sylvania, listed as 2N2450 (circa 1979).

2N2449 semiconductor manufactured by Sylvania, listed as 2N2449 (circa 1979).

2N2448 semiconductor manufactured by Sylvania, listed as 2N2448 (circa 1979).

2N2447 semiconductor manufactured by Sylvania, listed as 2N2447 (circa 1979).

2N2446 semiconductor manufactured by Sylvania, listed as 2N2446 (circa 1979).

2N2443 semiconductor manufactured by Sylvania, listed as 2N2443 (circa 1979).