2N1702 semiconductor manufactured by Sylvania, listed as 2N1702 (circa 1979).

2N1700 semiconductor manufactured by Sylvania, listed as 2N1700 (circa 1979).

2N1699 semiconductor manufactured by Sylvania, listed as 2N1699 (circa 1979).

2N1694 semiconductor manufactured by Sylvania, listed as 2N1694 (circa 1979).

2N1685 semiconductor manufactured by Sylvania, listed as 2N1685 (circa 1979).

2N1684 semiconductor manufactured by Sylvania, listed as 2N1684 (circa 1979).

2N1683 semiconductor manufactured by Sylvania, listed as 2N1683 (circa 1979).

2N1682 semiconductor manufactured by Sylvania, listed as 2N1682 (circa 1979).

2N1681 semiconductor manufactured by Sylvania, listed as 2N1681 (circa 1979).

2N1678 semiconductor manufactured by Sylvania, listed as 2N1678 (circa 1979).

2N1677 semiconductor manufactured by Sylvania, listed as 2N1677 (circa 1979).

2N1676 semiconductor manufactured by Sylvania, listed as 2N1676 (circa 1979).

2N1674 semiconductor manufactured by Sylvania, listed as 2N1674 (circa 1979).

2N1673 semiconductor manufactured by Sylvania, listed as 2N1673 (circa 1979).

2N1672A semiconductor manufactured by Sylvania, listed as 2N1672A (circa 1979).

2N1672 semiconductor manufactured by Sylvania, listed as 2N1672 (circa 1979).

2N1671 semiconductor manufactured by Sylvania, listed as 2N1671 (circa 1979).

2N1670 semiconductor manufactured by Sylvania, listed as 2N1670 (circa 1979).

2N1669 semiconductor manufactured by Sylvania, listed as 2N1669 (circa 1979).

2N1668 semiconductor manufactured by Sylvania, listed as 2N1668 (circa 1979).