Another insert set in the 2013 Topps lineup is Proven Mettle. The Proven Mettle insert set is a 25 card set that featured a large coin inside the card. There are three different varieties of coins, copper coins on cards that are numbered out of 99, wrought iron coins on cards numbered to 50 and steel coins on cards numbered out of ten. These cards can only be found in hobby and HTA/jumbo packs.
Take a look at the VISUAL checklist, as well as other 2013 Topps checklists, by clicking on the links on the right side of my blog!