Any pistol experts on the board? I have an unusual one, and have never been able to identify either the pistol or the type. It is a percussion of about 65 caliber, smoothbore, barrel 8.5”, tapered, slightly swamped and flared, almost certainly hand forged. It appears to be octagon to round with a wedding band, but the bottom of the barrel inside the stock is all round. There is a deeply stamped touchmark on the top flat at the breech with letters and symbols which I’ve been unable to decipher. There are no other marks under the barrel or anywhere else on the gun except possibly an "S" in a couple of places on the lock and on the ramrod. The most unusual thing about it is the lock. The hammer has a rearward projection which latches onto two projections, the sears, one for half cock, one for full cock, which exit the lock plate right behind the hammer. The trigger retracts those two projecting sears, releasing the hammer. The gun was originally of high quality, with well executed engravings, silver inlays on the barrel flats at the breech, engraved/sculpted wedding band, checkering on the grip, European walnut stock, metal ramrod with a filed worm on the end, sea shell bolster for the nipple and dolphin-head hammer. Here are some initial pictures. Any thoughts about the identity of this pistol, the type of lock, etc., will be greatly appreciated.