I found these antique medallions when traveling through Italy this past summer. Price is for one, look at photos and choose by description and photo number. I do not know the metal used in these, they are heavy, and cleaned up with silver polish.
Photo 2-3, I have googled to try to find out something about this coin, it is in Spanish, Translates on back: The bullfight, varied arts, 1975, grand prix, Bologna
It measures 1 1/4 square, it appears to be sterling with a gold edge.
Photo 4-5 the medal features the famous Fountain of Neptune which is in the center of Bologna, back reads: S. P. Aquedela 3 Camminata (walk) Bologna, it measures 1 1/4 round
Materials: silver, brass perhaps, gold, metal.