Clint Eastwood's holster in the Dollars Trilogy was made by Andy Anderson who was a famous leatherworker in Hollywood. It was reused and reworn by Eastwood in both Hang 'Em High (1968) and High Plains Drifter in (1973) so it appeared in at least 5 Eastwood Westerns.
The Andy Anderson gun rigs were made popular by a number of movies and the fast draw craze of the 50’s and 60’s.
Sergio Leone met personally with Andy Anderson prior to the Filming of A Fistful of Dollars and went over all of the gun leather to be used in the movie which Andy would create. The meeting was held at the Andy Anderson Gunfighter Shop in Hollywood, CA. and at the time of the meeting Andy had been working in his shop. When Andy Anderson and Sergio Leone met, Sergio Leone noticed Andy Anderson was wearing a Leather Wrist Brace Andy had Handmade on his wrist and when he asked Andy about the wrist strap Andy explained he had a Shrapnel Injury from World War II which affected his wrist.
By the mid 1970s, Anderson had suffered a series of strokes and was forced to retire and close the [North Hollywood] Gunfighter shop.
The rig Clint used in those movies was the one he used in Rawhide I believe, certainly he had it for some time, and it would have acquired some dirt and sweat and sun exposure, all of which would add to the darker colour over time.
I recently had a viewer contact me with some great information about the Andy Anderson walk n draw rigs, he’d visited with Andy in his Leather shop back in the 70's, and commissioned an Eastwood replica rig from him, which he received in due course, from that he was able to give me accurate dimensions of the gunfighter stitch detail, and the contour of the gunbelt, so I have now updated my patterns to reflect this new information.