2N3617 semiconductor manufactured by Sylvania, listed as 2N3617 (circa 1979).

2N3616 semiconductor manufactured by Sylvania, listed as 2N3616 (circa 1979).

2N3615 semiconductor manufactured by Sylvania, listed as 2N3615 (circa 1979).

2N3614 semiconductor manufactured by Sylvania, listed as 2N3614 (circa 1979).

2N3613 semiconductor manufactured by Sylvania, listed as 2N3613 (circa 1979).

2N3612 semiconductor manufactured by Sylvania, listed as 2N3612 (circa 1979).

2N3611 semiconductor manufactured by Sylvania, listed as 2N3611 (circa 1979).

2N3607 semiconductor manufactured by Sylvania, listed as 2N3607 (circa 1979).

2N3606 semiconductor manufactured by Sylvania, listed as 2N3606 (circa 1979).

2N3605 semiconductor manufactured by Sylvania, listed as 2N3605 (circa 1979).

2N3600 semiconductor manufactured by Sylvania, listed as 2N3600 (circa 1979).

2N3588 semiconductor manufactured by Sylvania, listed as 2N3588 (circa 1979).

2N3585 semiconductor manufactured by Sylvania, listed as 2N3585 (circa 1979).

2N3584 semiconductor manufactured by Sylvania, listed as 2N3584 (circa 1979).

2N3583 semiconductor manufactured by Sylvania, listed as 2N3583 (circa 1979).

2N3582 semiconductor manufactured by Sylvania, listed as 2N3582 (circa 1979).

2N3581 semiconductor manufactured by Sylvania, listed as 2N3581 (circa 1979).

2N3580 semiconductor manufactured by Sylvania, listed as 2N3580 (circa 1979).

2N3579 semiconductor manufactured by Sylvania, listed as 2N3579 (circa 1979).

2N3578 semiconductor manufactured by Sylvania, listed as 2N3578 (circa 1979).