1N5403 semiconductor manufactured by Sylvania, listed as 1N5403 (circa 1979).

1N5353B semiconductor manufactured by Sylvania, listed as 1N5353B (circa 1979).

1N5266A semiconductor manufactured by Sylvania, listed as 1N5266A (circa 1979).

1N5227B semiconductor manufactured by Sylvania, listed as 1N5227B (circa 1979).

1N5227A semiconductor manufactured by Sylvania, listed as 1N5227A (circa 1979).

1N5848B semiconductor manufactured by Sylvania, listed as 1N5848B (circa 1979).

1N5593 semiconductor manufactured by Sylvania, listed as 1N5593 (circa 1979).

1N5543A semiconductor manufactured by Sylvania, listed as 1N5543A (circa 1979).

1N5402 semiconductor manufactured by Sylvania, listed as 1N5402 (circa 1979).

1N5353A semiconductor manufactured by Sylvania, listed as 1N5353A (circa 1979).

1N5266 semiconductor manufactured by Sylvania, listed as 1N5266 (circa 1979).

1N5227 semiconductor manufactured by Sylvania, listed as 1N5227 (circa 1979).

1N5846B semiconductor manufactured by Sylvania, listed as 1N5846B (circa 1979).

1N5592B semiconductor manufactured by Sylvania, listed as 1N5592B (circa 1979).

1N5543 semiconductor manufactured by Sylvania, listed as 1N5543 (circa 1979).

1N5401 semiconductor manufactured by Sylvania, listed as 1N5401 (circa 1979).

1N5353 semiconductor manufactured by Sylvania, listed as 1N5353 (circa 1979).

1N5265B semiconductor manufactured by Sylvania, listed as 1N5265B (circa 1979).

1N5226B semiconductor manufactured by Sylvania, listed as 1N5226B (circa 1979).

1N5845B semiconductor manufactured by Sylvania, listed as 1N5845B (circa 1979).