In 1930, Robert T. Jones, Jr.* won all four majors, the only Grand Slam in golf history

In 1934,  Mr. Jones* founded Augusta National,* the only club whose course he laid out

In between, Mr. Jones* and Spalding* introduced these irons, the only set he ever designed

*References to Mr. Jones, Augusta National, and Spalding for informational purposes only; no endorsement is expressed or implied