1N5194 semiconductor manufactured by Sylvania, listed as 1N5194 (circa 1979).

1N5579A semiconductor manufactured by Sylvania, listed as 1N5579A (circa 1979).

1N5529A semiconductor manufactured by Sylvania, listed as 1N5529A (circa 1979).

1N5379 semiconductor manufactured by Sylvania, listed as 1N5379 (circa 1979).

1N5340 semiconductor manufactured by Sylvania, listed as 1N5340 (circa 1979).

1N5252B semiconductor manufactured by Sylvania, listed as 1N5252B (circa 1979).

1N5190 semiconductor manufactured by Sylvania, listed as 1N5190 (circa 1979).

1N5746C semiconductor manufactured by Sylvania, listed as 1N5746C (circa 1979).

1N5579 semiconductor manufactured by Sylvania, listed as 1N5579 (circa 1979).

1N5529 semiconductor manufactured by Sylvania, listed as 1N5529 (circa 1979).

1N5378B semiconductor manufactured by Sylvania, listed as 1N5378B (circa 1979).

1N5339B semiconductor manufactured by Sylvania, listed as 1N5339B (circa 1979).

1N5252A semiconductor manufactured by Sylvania, listed as 1N5252A (circa 1979).

1N5189 semiconductor manufactured by Sylvania, listed as 1N5189 (circa 1979).

1N5746B semiconductor manufactured by Sylvania, listed as 1N5746B (circa 1979).

1N5578B semiconductor manufactured by Sylvania, listed as 1N5578B (circa 1979).

1N5528B semiconductor manufactured by Sylvania, listed as 1N5528B (circa 1979).

1N5378A semiconductor manufactured by Sylvania, listed as 1N5378A (circa 1979).

1N5339A semiconductor manufactured by Sylvania, listed as 1N5339A (circa 1979).

1N5252 semiconductor manufactured by Sylvania, listed as 1N5252 (circa 1979).