I need some help trying to find a price on a gun for a neighbor that REALLY needs the help. He has a old Parker brothers double barrel shot gun. The date on the gun is Mar 23, 1875. The gun is in pretty good shape it has the old hamers on the back of the barrels and the barrels are damiscus. Plus it has a silver shield insignia on the top of the grip, maybe state police or railroad? On the back of the trigger guard the serial number is 77383. Please if any one could help I would be VERY thank full. Please email me direct at firstname.lastname@example.org This is for a neighbor who needs all the help he can get thanks.