U.S. Model 1842 Pistol by Aston (AH4902)

U.S. Model 1842 Pistol by Aston. Dated 1852 on the lock and 1846 on the barrel. All markings on the lock are visible. Cartouches are very good. Metal has a light gray patina. One finds these guns with mismatched dates between the lock and barrel, but typically it is only a year. Hard to say what happened here but I would think this lock is a replacement. Condition matches well and we have no reason to believe this was not period.