Nice little pistol, I have owned one nearly identical to yours. Shot it several times and it was a fun little blaster. It was a larger caliber than yours, a screw barrel with a small powder chamber, around 10 grains capacity and a .395 round ball fit the breech chamber iirc. Sadly, I let it (and a number of others) go a few years ago due to financial concerns at the time. No Belgian proofs on mine, the only marking was a number on the barrel and breech. Probably intended to keep them matched up during assembly. I suspected it was either a domestic knock off of an Allen or one they made for a marketer or dealer to sell without their own name on it since there were no foreign proof marksPicked this up at my favorite LGS today. it is .31 caliber, no markings, in rough shape. I have two different opinions on it from shops that have sold one. One thinks it is late -1830's, patterned after an Ethan Allen. The other thinks it is circa 1850, and likely Belgian. In either case they sold for considerably more than the $20 I paid for it.
