1N5589A semiconductor manufactured by Sylvania, listed as 1N5589A (circa 1979).

1N5539B semiconductor manufactured by Sylvania, listed as 1N5539B (circa 1979).

1N5392 semiconductor manufactured by Sylvania, listed as 1N5392 (circa 1979).

1N5349B semiconductor manufactured by Sylvania, listed as 1N5349B (circa 1979).

1N5262A semiconductor manufactured by Sylvania, listed as 1N5262A (circa 1979).

1N5223A semiconductor manufactured by Sylvania, listed as 1N5223A (circa 1979).

1N5761 semiconductor manufactured by Sylvania, listed as 1N5761 (circa 1979).

1N5589 semiconductor manufactured by Sylvania, listed as 1N5589 (circa 1979).

1N5539A semiconductor manufactured by Sylvania, listed as 1N5539A (circa 1979).

1N5391 semiconductor manufactured by Sylvania, listed as 1N5391 (circa 1979).

1N5349A semiconductor manufactured by Sylvania, listed as 1N5349A (circa 1979).

1N5262 semiconductor manufactured by Sylvania, listed as 1N5262 (circa 1979).

1N5223 semiconductor manufactured by Sylvania, listed as 1N5223 (circa 1979).

1N5760A semiconductor manufactured by Sylvania, listed as 1N5760A (circa 1979).

1N5588B semiconductor manufactured by Sylvania, listed as 1N5588B (circa 1979).

1N5538B semiconductor manufactured by Sylvania, listed as 1N5538B (circa 1979).

1N5388B semiconductor manufactured by Sylvania, listed as 1N5388B (circa 1979).

1N5349 semiconductor manufactured by Sylvania, listed as 1N5349 (circa 1979).

1N5261B semiconductor manufactured by Sylvania, listed as 1N5261B (circa 1979).

1N5222B semiconductor manufactured by Sylvania, listed as 1N5222B (circa 1979).