18th c. Revolutionary Dug War era Hand Grenade

18th c. Revolutionary War era  dug hand grenade, from an old New York collection and sold at Skinner Auctions. Dig location uncertain, but believed to bein NY state.  Fully conserved.  Many other examples found around Ft. Ticonderoga. 3" in. in diamater and weighs roughly 2 pounds.  See Neumann, G. C., Kravic, P. 131. In Collector's illustrated encyclopedia of the American Revolution for a similar example.  Very rare.