The name on the bell must be Rumsey, not Rumsby. Louis M. Rumsey started and operated what became a huge company that manufactured and/or distributed an enormous variety of mostly durable goods. Among them were bells, and I’m certain that those were made for him, under his name, by one of the established bellfoundries – McShane of Baltimore for large bronze bells, Henry Stuckstede of St.Louis for small bronze bells, and someone else for steel postmount bells. The bell which Michael saw must be made of bronze, but would contain no silver at all. It’s the tin content of bronze which imparts what some see as a silvery appearance.