Around the 27-minute mark Lee Van Cleef's character Talby walks through a street with white buildings. This is the exact same set seen in For a Few Dollars More (1964). also starring Van Cleef (and Clint Eastwood). The particular scene in this film is also shot from the exact same perspective and angle as in "For a Few Dollars More" when Eastwood's character has a short stand-off with three Mexican gunslingers.
In the film, Scott Mary's mule is called Sartana; a common name for a gunslinger character in other spaghetti western films.
The theme song is used in Django Unchained, the training montage scene where Jamie Foxx/Django is practicing his shooting.
Body count: 26.
This was the fifth highest-grossing foreign film in Hong Kong box office since 1968.