I believe the movie you seek is called "Sabata," (1969), starring Lee van Cleef, and directed by Gianfranco Parolini. This movie is absolutely fantastic. There was also a sequel called "The Return of Sabata" which also stars van Cleef. A third entry was titled "Adios Sabata." It was not originally a Sabata film but was re-dubbed to capitalize on teh Sabata craze in europe. It stars Yul Brynner.
Sabata is known as a Spaghetti western, a subgenre of westerns filmed and produced in Europe during the 60's and seventies. If you like this film feel free to try other spag