My ballard is serial # 193. It's stamped on the barrel, receiver ,extractor, forearm and butt plate. The barrel is also stamped 44 and it is a 44 caliber. It has the reversable firing pin and external extractor. The mystery to me is that is has the 3 line markings of JM Marlin with the 1875 pat date. Any help on identifying this will be much appreciated since it does not seem to show up in the references that I have. I do not yet have the Dutcher book. (30" round barrel, "S" lever, two range rear flip up sight, blade front sight, good working order, lever locking stud broken off. Was able to remove falling block to check for serial #. It is also marked #193 on each half of the block.