1N5748 semiconductor manufactured by Sylvania, listed as 1N5748 (circa 1979).

1N5580A semiconductor manufactured by Sylvania, listed as 1N5580A (circa 1979).

1N5530A semiconductor manufactured by Sylvania, listed as 1N5530A (circa 1979).

1N5380 semiconductor manufactured by Sylvania, listed as 1N5380 (circa 1979).

1N5341 semiconductor manufactured by Sylvania, listed as 1N5341 (circa 1979).

1N5253B semiconductor manufactured by Sylvania, listed as 1N5253B (circa 1979).

1N5196 semiconductor manufactured by Sylvania, listed as 1N5196 (circa 1979).

1N5747B semiconductor manufactured by Sylvania, listed as 1N5747B (circa 1979).

1N5580 semiconductor manufactured by Sylvania, listed as 1N5580 (circa 1979).

1N5530 semiconductor manufactured by Sylvania, listed as 1N5530 (circa 1979).

1N5379B semiconductor manufactured by Sylvania, listed as 1N5379B (circa 1979).

1N5340B semiconductor manufactured by Sylvania, listed as 1N5340B (circa 1979).

1N5253A semiconductor manufactured by Sylvania, listed as 1N5253A (circa 1979).

1N5195 semiconductor manufactured by Sylvania, listed as 1N5195 (circa 1979).

1N5747 semiconductor manufactured by Sylvania, listed as 1N5747 (circa 1979).

1N5579B semiconductor manufactured by Sylvania, listed as 1N5579B (circa 1979).

1N5529B semiconductor manufactured by Sylvania, listed as 1N5529B (circa 1979).

1N5379A semiconductor manufactured by Sylvania, listed as 1N5379A (circa 1979).

1N5340A semiconductor manufactured by Sylvania, listed as 1N5340A (circa 1979).

1N5253 semiconductor manufactured by Sylvania, listed as 1N5253 (circa 1979).