The picture shows a view of the (2) Different Old Soap Box Derby Race Advertising Souvenir Pin Back Buttons in this lot. These are not dated but they are old. One has an emblem and the other has a checkered flag. They are marked as follows:
CHAMBERSBURG (Pennsylvania ?) SOAP BOX DERBY MEMBER THE UNITED STATES JUNIOR CHAMBER OF COMMERCE
SOAP BOX DERBY GREELEY, COLO.
The pinbackbuttons each measure 1-1/2'' wide. They appear to be in excellent to near mint condition as pictured.