I've seen several of those modified with S&W rear sight and ramp front sight added. They make great shooters and look good if properly done. I have a couple of very nicely reworked 45 Colts that were priced so reasonable I couldn't pass them up, and liked them so well I kept them. I believe I paid $400 for one and the other was part of a multiple gun buy, and probably somewhat less. If those are genuine Ivory grips, that's a pricey addition, but the coloring looks a bit "off" to me for aged ivory. I'm on the bitter half's laptop, which doesn't have the best resolution or color display.
After taking a closer look at the pictures, and the barrel markings, I believe the barrel may be one of the Numrich Arms after market barrels they once sold for the New Service guns.