This is a James Reid 32 caliber rimfire Knuckle-Duster. Just over 3000 were made in 32. It has the sliding safety on the bottom that locks the cylinder between chambers. The serial number is 9175 and was made in the mid to late 1870s. The mechanical function is good plus. No real finish remains but the markings are very good. Both men and women carried these little handy tools for hand fighting and it was known as a Knuckler.