First used on the open plains to hunt buffalo, the No. 1 Rolling block is an enduring firearm with a unique design. In the Remington rolling block action, the hammer serves to lock the breech closed at the moment of firing, and the block prevents the hammer from falling with the breech open. The Spanish-made Rolling Block rifle was manufactured under license from the Remington Arms company by the Spanish armory at Oviedo. The rifles were chambered .43 Spanish Reformado, the proprietary national cartridge for the kingdom of Spain. The breech block, hammer, and trigger guard are about .040 inch wider than the Remington counterparts and do not interchange. Other additions include a firing pin retractor and a unique cleaning rod housed in a specially made channel. This 1887-manufactured rifle a flip-up rear volley sight with a post front. Its wood and metal are in good condition and its bore is in very good condition.