The Topps Annual Report for the year ending March 2, 1974, included the following photo of Sy Berger presenting Willie Mays with a special display of all the baseball cards from his career.
The report says it was at an event at Shea Stadium in October 1973, but it looks more like it was during Willie Mays Night on September 25, 1973, given the this video on MLB.com and the following color photo from centerfieldmaz.
Happy collecting!
Super cool. I wonder if the Mays family still has this hanging up somewhere.