Unfortunalely it’s the Italian version, as described in the films thread, with the switched round flashback sequence at the begining. Or at least I think it is, quite tricky to follow as the editing doesn’t show who is speaking for many of the shots, an early attempt at a “first person shooter” perhaps. :
SPOILER: The ending, the guy whose identity is hidden, reveals it just before he looses a gunfight in the saloon to the guy with the cattle brand on his back (Barret) (although we don’t actually see the gunfight). Barret leaves the saloon and is aproached by Elvis (The Federal Man) who says “…you’re under arrest, the charge is murder… …are you going to come along peacefully Barret?” Barret has a brief flash back along with premonitions of the gallows and replies “Never!”. So The Federal Man kills him.