I have a old single shit 12g shotgun with a swing release behind the hammer. ON the top of the barrel is where the name is that the best i can read, as the bottom of letters are worn, says "fnhtne" armory "stefl". On the left side of action it says SPECIAL and a marking "12" then a diamond with a C inside. ON the bottom of action behind the trigger is the serial number. It has diamond shape carvings on the fore grip and the but stock. ANY HELP with the name, age, value etc would be greatly appreciated.