Thanks, Cliff.
It's a European single bend from Tandy's, veg tan, 8-9 oz.
I dyed it with Ecoflo Pro Waterstain, medium brown. I gave it a light initial dyeing and then a second heavier one. I find this pro range pretty good. I was trying to duplicate the original in the Autry Museum which, like a lot of Collins holsters, is darkish brown.