First, I misspelled Sergey's name it is Lyalko, his website is
http://rustbluing.com/index.html. He did a beautiful job of cleaning up some rough spots, edges are crisp. No marking enhancements. This is a barrel cutoff and replacement/reline done years ago by Federal Ordnance for a family member; sold through Briklee Trading Company to someone who didn't know any better, namely me. Over the years parts have been replaced and fitted until it functioned reliably, sights were zeroed by moving the rear aperture and adding height to the front sight, and finally finished to what you see now.