The opening credits and subsequent transition shots are of the Durango Silverton narrow gauge railroad. It is very obviously B-roll from the opening and closing titles of Support Your Local Gunfighter (1971), which UA released the previous year, though cropped to 2.35:1.
Unofficially regarded as the third part of the Trinità Trilogy: They Call Me Trinity (1970), Trinity Is Still My Name (1971) and this movie.
When shown on US television, this film is titled "Man of the East".
Italian censorship visa #60912 delivered on7/9/72.