So I recently took the metal part off the rear of the forend of my breakdown 99, 244xxx sn, 1921 supposedly, and stamped under the S/N on that metal piece is an H, definitely an H. I also noticed after the S/N that's stamped in the wood by the latch at the other end of the latch hook is another H. Does this mean it's an H model? Is there any site or book that describes all the different models of the 99? I certainly haven't found one. It gets very confusing. One would think that different models would have distinctive features, but maybe not? I just don't seem to be able to find the info other than through hearsay and the bit I've gleaned here, but I find even some of that suspect.