British Revolutionary War 21st Regiment of Foot Enlistedman's Coat Button

Very nice dug British Revolutionary War 21st Regiment of Foot enlistedman's, cast 1-piece pewter, coat button. The front features an incised crown above 21 above thistles. It is on a plain field. Pretty nice detail and a deep grey patina. The shank is missing from the reverse and the edge has some chipping. The pewter is super solid. $200