These two followed me home from Denver also. Frankfort Armory moulds. I got two of the three that was there, I missed the .44 cal mould. These are .45 caliber and .30 caliber. They were provided to National Guard and other Army organizations to cast round balls for loading into the service cartridge case for indoor gallery practice and small game hunting. In that era Guard units had to supply much of their own ammunition if they wished to have firing practice. Frankfort Arsenal and Ideal each made sets of Arsenal reloading tools just for this purpose. Neither of which are commonly seen today.
The moulds are large, heavy and made of brass or bronze.
Ken