Nose cap. If you mean the trim piece at the end of stock towards the muzzle, then yes. Seems to be solid brass. The wedge escutcheons are brassish. Could be silverish too. I put one the buffing wheel. It actually shined somewhere between silver and brass. Took that to mean thin plating. The ends of the wedges are definitely silverish. Figured it was stamped steel. I will review your link with interest.Did you get a nose cap and wedge escutcheons with it? If so are they iron or silver? If silver my money is on a Western Arms or Allen F.A. kit from 1985-ish.
Here is a pretty well documented run down on the history of the Uberti/Ithaca/Santa Fe/Jedediah Smith/Western Arms/Allen F.A. Hawkens.
http://grrw.org/uberti-santa-fe-hawken/