The backglass depicts Hugh Hefner with 1976 Playmate Patti McGuire and 1977 Playmate Sondra Theodore. Tom Nieman, VP of Marketing for Bally Pinball, told us his name or initials appeared on most backglasses of this time period for which he obtained the license. On this game, his name appears on the champagne bottle. The start-up tune, Grotto tune, and bonus score countdown tune resemble portions of Cy Coleman's "Playboy's Theme" from the 1969 TV show "Playboy After Dark". An article in the Spring 2019 issue of Playboy magazine about the "Singing Playmates" mentioned that their producer Vic Caesar "arranged the surprisingly famous theme to the Playboy pinball game." We previously has an erroneous Project Date of 12-9-1978.