Flintlock pistol from the battlefield of Waterloo

Flintlock pistol, belonging to a pair, with a steel smooth round barrel and flat steel lock (marked). Below, at the front of the barrel, a movable bracket with a steel fixed ramrod, which is set in a partially vanished root-nut wooden stock. The rear of the barrel has a ring and tail with a screw. Front of the stock with a copper stock band. Copper screw plate with two steel bolts. Copper trigger guard (marked). Copper patch box with a steel screw. The pistol was brought from the battlefield of Waterloo by J.J. Nepveu, 2nd Lieutenant of the 6th Regiment of Hussars.