We were in an antique shop in Reno, and they had baggies with...5, I think, books of matches per baggie. I wanted the Sagebrush matches, so bought 3 bags. I know the Harrah's and Harolds Club matches were in those baggies...Sonoma Inn might have been, but I'm not sure.

Our Horseshoe matchbook came from ebay .

You made a nice find!