Der Schatz der Azteken
Dr. Karl Sternau, the personal physician of the count Bismarck, who spent much of his youth in Mexico, is sent back to that country during the occupation by French troops in the service of the Austrian 'Emperor' Maximilian, to carry an encouraging letter from U.S. President Lincoln to the nationalist Mexican president Benito Juarez.
Starring Lex Barker, Rik Battaglia, Fausto Tozzi, Michèle Girardon, Theresa Lorca, Gérard Barray, Alessandra Panaro, Hans Nielsen, Gustavo Rojo, Kelo Henderson
It's a action & adventure and western movie, and has a rating of 5.3 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from United States.