Ensigns are the largest class, by far, of full-keel, one design sailboats in the United States.
The 22-1/2 foot sloop was designed by Carl Alberg and produced by Pearson Yachts of Portsmouth, Rhode Island.
Since 1962. nearly 1800 Ensigns have been built.
Action at windward mark, picture from the 1965 Ensign yearbook