For your consideration, here is a Hume St. Preservation Jazz Band Pinback Button Pin, no. 405.  It has some wear and there is some tarnish on the back of it.  The button measures 2 3/4 inches tall by 1 5/8 inches wide.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (544.904f-.4px1)