In 1934, 1936 and 1937, the Masters Teams-of-Four and the Asbury Park Trophy were separate events, providing two sets of winners. In 1938 the event became the Spingold Master Knockout Teams and a part of the Summer NABC. At one time, the Spingold was a double elimination event, usually lasting nine or 10 sessions. It was scored by International Match Points and was restricted to players with 100 or more masterpoints. In 1965, the double elimination method was replaced by three qualifying sessions (subsequently reduced to two), followed by single elimination knockout matches. The preliminary qualifying sessions were dropped in 1970.