On the back cover, underneath the second hand-print design, text provides details of the fictitious Jim Keltner Fan Club, information on which was available by sending a "stamped undressed elephant" – for: self-addressed envelope – to a Los Angeles postal address. This detail was an affectionate thank-you to the popular drummer (Starr would repeat the gesture on his album later in the year), as well as a light-hearted dig – in its use of "wing" symbols, like those in Wings' logo – at McCartney, who had recently launched a fan club for his new band.