I have an 1851 SA Colt blank firer. There's no maker's name on it. It vents under the barrel. The brass and blued steel are lovely quality, the hammer and rammer are case-hardened. The only niggle for me is that the grips are slightly different colours. It's a lovely piece; I'd say almost as good as the Uberti/Pietta Brococks I have. I don't fire it - it's too bloody loud!