It would look like The Hickock that Uberti has recently offered. Took it to a local gunsmith and he wanted $150 to cut a groove and do a silver solder install. Seemed a bit pricey considering I bought a NIB 8" Cimarron replacement barrel with sight for $175. Since the barrel is close to worthless anyway, I thought I might give it a go but there is nothing on YouTube or anywhere else discussing install of a blade sight on a barrel needing to be grooved. Is it worth the trouble or expense? It's really a cosmetic issue, not improving function.