2N1634 semiconductor manufactured by Sylvania, listed as 2N1634 (circa 1979).

2N1633 semiconductor manufactured by Sylvania, listed as 2N1633 (circa 1979).

2N1632 semiconductor manufactured by Sylvania, listed as 2N1632 (circa 1979).

2N1631 semiconductor manufactured by Sylvania, listed as 2N1631 (circa 1979).

2N1624 semiconductor manufactured by Sylvania, listed as 2N1624 (circa 1979).

2N1623 semiconductor manufactured by Sylvania, listed as 2N1623 (circa 1979).

2N1622 semiconductor manufactured by Sylvania, listed as 2N1622 (circa 1979).

2N1614 semiconductor manufactured by Sylvania, listed as 2N1614 (circa 1979).

2N1613S semiconductor manufactured by Sylvania, listed as 2N1613S (circa 1979).

2N1613L semiconductor manufactured by Sylvania, listed as 2N1613L (circa 1979).

2N1613 semiconductor manufactured by Sylvania, listed as 2N1613 (circa 1979).

2N1608 semiconductor manufactured by Sylvania, listed as 2N1608 (circa 1979).

2N1607 semiconductor manufactured by Sylvania, listed as 2N1607 (circa 1979).

2N1606 semiconductor manufactured by Sylvania, listed as 2N1606 (circa 1979).

2N1605A semiconductor manufactured by Sylvania, listed as 2N1605A (circa 1979).

2N1605 semiconductor manufactured by Sylvania, listed as 2N1605 (circa 1979).

2N1604 semiconductor manufactured by Sylvania, listed as 2N1604 (circa 1979).

2N1603 semiconductor manufactured by Sylvania, listed as 2N1603 (circa 1979).

2N1602 semiconductor manufactured by Sylvania, listed as 2N1602 (circa 1979).

2N1601 semiconductor manufactured by Sylvania, listed as 2N1601 (circa 1979).