Here is an Orville Ainsworth. First one I have seen.https://www.gunsinternational.com/guns-for-sale-online/revolvers/usfa-pistols-revolvers/u-s-fire-arms-mfg-co-orville-ainsworth-saa-cavalry-model-45-colt-7-1-2-barrel-old-armory-case-color-armory-blue-new-in-box.cfm?gun_id=102214015