Picked this up this winter as a project as cosmetically it needed TLC. Mechanically it is fine. So I repaired the toe, refinished the wood and re-blued the barrels. I wasn't going to spend the money having the checkering re-cut so I stippled it. It will be one of my knock around guns. I had a BSS for awhile but this gun is far and away lighter and better handling. I don't know if this is a model 500 or?