Revolutionary War Cannon Shot - 2 3/8 Diameter

I'm not especially interested I'm relics of war for their historic value, but sometimes they're really beautiful. This (update: Revolutionary War era) iron canon shot to me is that, with its uncleaned craggy surface making it look a bit like a miniature planet earth. Plus it weighs about two pounds--such that one could use it as a paperweight and also for arm exercises! 

Approx 2 3/8" in diameter and 2 lb.