1N7007 semiconductor manufactured by Sylvania, listed as 1N7007 (circa 1979).

1N7006 semiconductor manufactured by Sylvania, listed as 1N7006 (circa 1979).

1N7005 semiconductor manufactured by Sylvania, listed as 1N7005 (circa 1979).

1N7004 semiconductor manufactured by Sylvania, listed as 1N7004 (circa 1979).

1N7003 semiconductor manufactured by Sylvania, listed as 1N7003 (circa 1979).

1N7002 semiconductor manufactured by Sylvania, listed as 1N7002 (circa 1979).

1N7001 semiconductor manufactured by Sylvania, listed as 1N7001 (circa 1979).

1N6091B semiconductor manufactured by Sylvania, listed as 1N6091B (circa 1979).

1N6090B semiconductor manufactured by Sylvania, listed as 1N6090B (circa 1979).

1N6089B semiconductor manufactured by Sylvania, listed as 1N6089B (circa 1979).

1N6088B semiconductor manufactured by Sylvania, listed as 1N6088B (circa 1979).

1N6087B semiconductor manufactured by Sylvania, listed as 1N6087B (circa 1979).

1N6085B semiconductor manufactured by Sylvania, listed as 1N6085B (circa 1979).

1N6083B semiconductor manufactured by Sylvania, listed as 1N6083B (circa 1979).

1N6082B semiconductor manufactured by Sylvania, listed as 1N6082B (circa 1979).

1N6068B semiconductor manufactured by Sylvania, listed as 1N6068B (circa 1979).

1N6031B semiconductor manufactured by Sylvania, listed as 1N6031B (circa 1979).

1N6030B semiconductor manufactured by Sylvania, listed as 1N6030B (circa 1979).

1N6029B semiconductor manufactured by Sylvania, listed as 1N6029B (circa 1979).

1N6028B semiconductor manufactured by Sylvania, listed as 1N6028B (circa 1979).