1N5277B semiconductor manufactured by Sylvania, listed as 1N5277B (circa 1979).

1N5239 semiconductor manufactured by Sylvania, listed as 1N5239 (circa 1979).

1N5711 semiconductor manufactured by Sylvania, listed as 1N5711 (circa 1979).

1N5565A semiconductor manufactured by Sylvania, listed as 1N5565A (circa 1979).

1N5461A semiconductor manufactured by Sylvania, listed as 1N5461A (circa 1979).

1N5364B semiconductor manufactured by Sylvania, listed as 1N5364B (circa 1979).

1N5277A semiconductor manufactured by Sylvania, listed as 1N5277A (circa 1979).

1N5238B semiconductor manufactured by Sylvania, listed as 1N5238B (circa 1979).

1N5875B semiconductor manufactured by Sylvania, listed as 1N5875B (circa 1979).

1N5702A semiconductor manufactured by Sylvania, listed as 1N5702A (circa 1979).

1N5565 semiconductor manufactured by Sylvania, listed as 1N5565 (circa 1979).

1N5461 semiconductor manufactured by Sylvania, listed as 1N5461 (circa 1979).

1N5364A semiconductor manufactured by Sylvania, listed as 1N5364A (circa 1979).

1N5277 semiconductor manufactured by Sylvania, listed as 1N5277 (circa 1979).

1N5238A semiconductor manufactured by Sylvania, listed as 1N5238A (circa 1979).

1N5874B semiconductor manufactured by Sylvania, listed as 1N5874B (circa 1979).

1N5702 semiconductor manufactured by Sylvania, listed as 1N5702 (circa 1979).

1N5564B semiconductor manufactured by Sylvania, listed as 1N5564B (circa 1979).

1N5450A semiconductor manufactured by Sylvania, listed as 1N5450A (circa 1979).

1N5364 semiconductor manufactured by Sylvania, listed as 1N5364 (circa 1979).