I am not seeing any pictures here, but El Paso Saddlery was re-opened(?) by Bob McNellis in the early 1970's. So you may have one of his holsters.
On doing some checking, there also was an El Paso Saddlery Co. that renamed itself from Andrews & Hill in July 1890. The reason for the new name was that Andrews & Hill wanted to expand their product line from hardware and sporting goods to include harness and saddles.
I never asked Bob McNellis if he had started a new business, or if he had bought a former one to continue. Bob made reproduction holsters and cartridge belts of the "old west" style.