The Yachtsman 1962-1963 #789 Complete.

This costume would be repeated in 1964 with a variation:  1964 The Yachtsman (with cap) #0789.  The 1964 edition included a Yachtsman's cap that was not available in this edition.  The stock number was changed to #0789.  The variation was only available in 1964, making it rarer.