Despite the fact that they're antique, I've seen a number of these types of medals over the years with the same/similar image used. There's a Pittsburgh church league medal for sale on eBay currently... Its also by Dieges & Clust (No, its not mine)
I can't add more regarding any Wagner connection though.
https://www.ebay.com/itm/RARE-1920-P...AAAOSwnDRcYexe