Mostly commonly, #91 Fleming Mackell is found with no biographical write-ups on its reverse side in either English or French. Less frequently found is the variety that has everything printed on the back. The toughest example is the one where only the French biographical write-up is printed while the English biographical write-up is missing. Finally, a few of the no-bio examples can be located where a hint of the French text can be seen along the periphery of the text box, creating a fourth possible variation.