I agree with Dakota Widomaker, there is a huge difference between modern hot salt bluing and the old style rust bluing. Those Henrys on the rarewinchesters web page or some of the finest exmples. I imagine the majority of surving examples are much worse for wear. The old rust blue was much more of a transluscent royal blue color, compared to modern hot bluing that is almost black and deeper. If you look at the close ups of some of the rifles on rarewinchesters, you can still see some of the royal blue color. The old rust blue was not near as durable as modern blueing either. I think that many rifles that were "rode hard and put away wet", soon lost a lot of their blue as it turned patina.
FWIW, I stripped the hot blue from my Uberti Henry and refinished it with a mix of browning and cold blue. The brass has had several years of honest patina enhanced by straight diet of black powder .44 WCF shells. The wood was srtripped and given a basic oil finish. My persona is in the early indian wars period, it works out to be like a 10-15 year old well used rfile that has had plenty of rain, snow and scabbard wear.
To each his own, for me its just more comfortable looking.