AO-4697-4, 2012, Joe DiMaggio, Add-on Cachet, Baseball All-Stars,  Pictorial Cancel, SC 4697

Add-on cachet is:

A cachet design added to a cover which was originally uncacheted. An add-on cachet should be identified

by maker and date (mine are stamped on the back with the date) so that it is clear that it is not contemporary with the cover.