USDA Prime. The one percenter. Nothing but the best, USDA Prime. Certified Angus Beef Chuck. Est. 1978. The very best burger. 75% lean. 25% fat. In the late of 1800s, Harry Schweid started selling high quality meats to butchers and restaurants in New York City's lower east side. By the 1930's, his son San had his own business in harlem, selling the best meat around. In 1978, we focused our expertise on one thing ground beef. Today, that passion is carried on with a single-minded dedication to producing the best tasting, highest quality burger. As Sam always said, if you put only good meat into your burgers, only good things will come out. We hope you agree. US inspected and passed by Department of Agriculture. schweidandsons.com Twitter. Facebook. Instagram. Product of USA.