Here are five silver coins and some broken pieces found metal detecting. I know these are French medieval coins. However, does anybody know the difference between the Philip III, Philip IV and Philip V silver coins? I am specifically trying to differentiate the Gros Tournois silver coins made during their time. I have searched in vain for the differences but I end up becoming more confused because there seems to be so many varieties out there. I cannot pinpoint an exact way to tell the difference(s).
Any French medieval coin experts out there? I would greatly appreciate any help! Thanks.

