A good 18th Century German rifled flintlock pistol

A good 18th Century German rifled flintlock pistol, swamped sighted barrel 9.5 in., seven-groove rifling; border engraved lock signed 'HESS IN ZWEYBRUKEN', swan necked cock (broken); full stock with carved decoration around the tang and furniture, white metal furniture including a fore end cap integral to the first ram rod tube and with fluting contiguous with that on the stock. Either Philipp Daniel (1754 - c.1800) or Johann Daniel Hess (1713-91) of Zweibrücken in the Rhineland.