1N5250 semiconductor manufactured by Sylvania, listed as 1N5250 (circa 1979).

1N5174 semiconductor manufactured by Sylvania, listed as 1N5174 (circa 1979).

1N5743 semiconductor manufactured by Sylvania, listed as 1N5743 (circa 1979).

1N5576A semiconductor manufactured by Sylvania, listed as 1N5576A (circa 1979).

1N5526A semiconductor manufactured by Sylvania, listed as 1N5526A (circa 1979).

1N5376 semiconductor manufactured by Sylvania, listed as 1N5376 (circa 1979).

1N5336B semiconductor manufactured by Sylvania, listed as 1N5336B (circa 1979).

1N5249B semiconductor manufactured by Sylvania, listed as 1N5249B (circa 1979).

1N5173 semiconductor manufactured by Sylvania, listed as 1N5173 (circa 1979).

1N5742B semiconductor manufactured by Sylvania, listed as 1N5742B (circa 1979).

1N5576 semiconductor manufactured by Sylvania, listed as 1N5576 (circa 1979).

1N5526 semiconductor manufactured by Sylvania, listed as 1N5526 (circa 1979).

1N5375B semiconductor manufactured by Sylvania, listed as 1N5375B (circa 1979).

1N5336A semiconductor manufactured by Sylvania, listed as 1N5336A (circa 1979).

1N5249A semiconductor manufactured by Sylvania, listed as 1N5249A (circa 1979).

1N5172 semiconductor manufactured by Sylvania, listed as 1N5172 (circa 1979).

1N5742 semiconductor manufactured by Sylvania, listed as 1N5742 (circa 1979).

1N5575B semiconductor manufactured by Sylvania, listed as 1N5575B (circa 1979).

1N5525B semiconductor manufactured by Sylvania, listed as 1N5525B (circa 1979).

1N5375A semiconductor manufactured by Sylvania, listed as 1N5375A (circa 1979).