Lots of times people come into possession of a nice older saddle that they have no idea of the maker. Usually, saddles have the maker's MARK in some location on the saddle. Many English saddles have the maker's mark on the sweat flap or on the girth buckle protectors, or on a metal tab attached near where the stirrup bars are.
Western saddle may have the maker's mark on the latigo keeper or on the skirt, front or back center or both.
This website has many older ("vintage") saddle maker's marks photographed with descriptions of the companies and their products.
A great resource!
Vintage Antique Saddlery and Gun Leather Company Histories and Maker Marks: D,E,F,G - www.vintagegunleather.com California