This I think is 69 caliber and called a British tower pistol. It has never been fired, just a wall hanger. It is fully functional if you get a flint for it. Nothing is missing, thread hole,on lock plate is because fastener is inside stock and threads out to attach lock. Track of the Wolf has flints and supplies to use this. Bore is very clean, hammer spring feels strong, flash pan is brass. No cracks in stock, but some superficial little marks here and there as seen in pics. Stock could easily be refinished if pretty wood is your goal. Made in Germany and this is an old piece. Barrel is very thick, the rig feels to weigh 5lb., my guess. Had small wood rammer in end of stock that pulls out for use.