Hi and Welcome to Robin's Nest! Here's a great item for all McCartney and / or Wings fans...  a set of "Back To The Egg" promotional trading cards!  These were originally part of the "Back To The Egg" box set and were also issued as a promotion through the Wings Fan Club in 1979.  Each card has a biography of the individual artist on the back.  All cards are approximately 1-3/4" x 3" and are in near-mint condition.