It sounds like it could be the Original 10 carcass that has changed hands on the AirgunBBS at least three times! I owned it at one point. I looked on it as a rebuild project but concluded that it would be too expensive for me to justify and my engineering skills were not sufficient. If you are going to restore it to health then I would be very interested to see the photos. These are excllent match pistols and it would be good to see it restored to health.