With Chuck Brinkman showing on top, and George Scott on reverse, this PSA 9 mint 1973 Topps cello is of the “all series” variety, issued by Topps late in the year (probably to get rid of excess cardboard and gum inventory), and as a precursor to discontinuing series releases in 1974. It means that every card in the 1973 Topps set is possible in this cello, including the last card of Roberto Clemente, and the first of Mike Schmidt.