Turns out your second coin says METENSIS. The top of the T is cut off. This means it comes from the city of Metz, Alsace and Lorraine (now in France).
Saurma has a very similar type (not quite yours). The Numista page for that same type mentions your variety.
For the third coin, I'm tentatively reading the legend as +[A]NTO'VENER[I], which would point to Antonio Venier (1382-1400).
Best Numista match is this type of Venetian Crete. If so, excellent find!
Still no comment on the first coin - DNI BENE points to France, eagle and arms point to Austria. Can you post better photos - especially of the side with the year? Can't see anything on your tiny picture, sorry.
Saurma has a very similar type (not quite yours). The Numista page for that same type mentions your variety.
For the third coin, I'm tentatively reading the legend as +[A]NTO'VENER[I], which would point to Antonio Venier (1382-1400).
Best Numista match is this type of Venetian Crete. If so, excellent find!
Still no comment on the first coin - DNI BENE points to France, eagle and arms point to Austria. Can you post better photos - especially of the side with the year? Can't see anything on your tiny picture, sorry.

























