They look to be the type that was used to carry large bore single shot, either flintlock or percussion pistols . The bell shape allows room for both the handle/grip and lock. They were used by various foreign and US Calvary to carry two loaded handguns across the front of the saddle ( the term " horse pistols" ). Time frame would be anytime up to the late 1860/70;s. Maker? country of origin? Haven't foggiest, sorry about that.. They need some tender loving care but no neatsfoot oil.