1N5917B semiconductor manufactured by Sylvania, listed as 1N5917B (circa 1979).

1N5916B semiconductor manufactured by Sylvania, listed as 1N5916B (circa 1979).

1N5915B semiconductor manufactured by Sylvania, listed as 1N5915B (circa 1979).

1N5914B semiconductor manufactured by Sylvania, listed as 1N5914B (circa 1979).

1N5913B semiconductor manufactured by Sylvania, listed as 1N5913B (circa 1979).

1N5897B semiconductor manufactured by Sylvania, listed as 1N5897B (circa 1979).

1N5738 semiconductor manufactured by Sylvania, listed as 1N5738 (circa 1979).

1N5573 semiconductor manufactured by Sylvania, listed as 1N5573 (circa 1979).

1N5522B semiconductor manufactured by Sylvania, listed as 1N5522B (circa 1979).

1N5372B semiconductor manufactured by Sylvania, listed as 1N5372B (circa 1979).

1N5333A semiconductor manufactured by Sylvania, listed as 1N5333A (circa 1979).

1N5246A semiconductor manufactured by Sylvania, listed as 1N5246A (circa 1979).

1N5895B semiconductor manufactured by Sylvania, listed as 1N5895B (circa 1979).

1N5737B semiconductor manufactured by Sylvania, listed as 1N5737B (circa 1979).

1N5572B semiconductor manufactured by Sylvania, listed as 1N5572B (circa 1979).

1N5522A semiconductor manufactured by Sylvania, listed as 1N5522A (circa 1979).

1N5372A semiconductor manufactured by Sylvania, listed as 1N5372A (circa 1979).

1N5333 semiconductor manufactured by Sylvania, listed as 1N5333 (circa 1979).

1N5246 semiconductor manufactured by Sylvania, listed as 1N5246 (circa 1979).

1N5894B semiconductor manufactured by Sylvania, listed as 1N5894B (circa 1979).