Help with identifying Clement VII Quattrino (?) [opgelost]

I believe this coin to be a Clement VII ( G. de Medici ) Papal States Quattrino, but I have no reference for specific types. Hope someone with a good reference book can help.  Thanks ! 

17mm, 1.07g . Lettering best I can tell : CLEMENS * VII * P * M   / PETRVS SANT  

Most often (though not always) the image of St. Peter identifies the coin to Rome.  I think it is this one, or a slight variant:  https://www.acsearch.info/search.html?id=10823735

Thank you !