Troublsom 1, check my previous post for R. Grove hammer gun. It is just couple of pages back. That may answer some of your questions. Your gun looks very similar to mine and may have been made by the same manufacturer. Mine seems to be made by Midland. I would like to know if there is a serial number stamped into the steel and also a number stamped into the foerend wood under the left tube. Do the inside of your locks look like the ones in my post?