An 18th Century Hallmarked Solid Silver Butt Cap For A Gentleman's Musket

Heavy guage, cast, King George IIIrd London silver, dated either 1769 or 1789 [difficult to tell exactly]. This would enhance a musket or fowling piece up to a whole new level, either as a replacement for a plain brass type, or to replace a missing example. 147.5 grams weight, butt 50mm x 124mm, butt tang 105mm