Vintage HUNTER Leather Colt Holster.
Shoulder strap with Mexican silver buckle.
Also fits on belt.
3" wide where the strap goes across. 
41" strap end to end.
Distance from top of belt loop to end of inside slot 
where muzzle would fit: 8 1/2"
The slender area is 3 1/2" long. 
Cracks on strap. Darkened leather.

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