This looks to me like some of the bullet molds old timers around the turn of the twentieth century built for guns that were acquired without the original mold. Most molds originally made by the gunsmith that built the corresponding longrifle usually gave the mold a little more file work than this example displays.
It looks to be in good shape, and appears to not have been spring over time. It having no spruce cutter also make me think it was probably the second mold built for the gun.
Hungry Horse