Since 1909. Makes hearty sandwiches! Great sandwiches start with great bread! Chicago's deli favorite! A Chicago tradition since 1909. S. Rosen's has a proud reputation for baking the best tasting deli rolls, buns and breads. S. Rosen's Klassic Kaiser Buns add authentic fresh baked deli taste to your favorite sandwiches. "A truly delicious way to make your sandwich special." - Sam Rosen.