Presa Canario (Canary dog) and Cuban Dogge mix, Canary Islands, circa 1950´s
Good looking dog.
A picture of the same dog, in the testings that the people of Gran Canary Islands perform, they were called "Pechadas" or chest fighting, a dog that rejected to chest fighting, was not considered a Canary dog, even today in the Islands.
That is what a functional Presa Canario should look like. I could not tell it was a mix as the Cuban Dogo did not stray far from the Presa.