Artist Roy Parker placed on the backglass male characters from some of the previous games he did for Gottlieb. We list the referenced games as they appear on the backglass, from left to right: 1964 'Ship-Mates' 1957 'Falstaff' 1963 'Square Head' 1961 'Egg Head' 1960 'Texan' 1964 'Happy Clown' 1963 'Gaucho'