Numismatica-Italiana does not mention these anonymous issues of large copper "double bagatino" under the doge Andrea Gritti (1523-1538) in Venice. The official issues were small billon coins. The Numista file indicates that there were many variants for your coin.
There is a research lead HEREwith another type of Venetian anonymous issue
I believe that the Numista listing is showing the rare version with the madonna holding Jesus left (as we look at the coin). In yours Jesus is on the right.