134. What is the Beretta Color-Case Finish used on the Stampede revolvers?

Some insight into  "color case hardening", past and present, may better help to explain the Beretta Color-Case finish. 
"Color case hardening", as commonly used  from the mid 1800's until the early 1900's, was a process used  to heat treat the mild carbon steels commonly used in the manufacture of the firearms of the time.  The desired affect was to create a hard, wear-resistant surface on working parts that bear on, or support, other moving parts such as hammers, triggers, frames and levers (in the instance of lever action rifles). A secondary after-affect of the process was the staining of the steel surface in a mottled, multi-color pattern when the heated parts where quenched. In some instances, instead of polishing the parts to remove the multi-colored stain or "case hardening colors" and bluing the parts, the manufacturers elected to leave the parts in the natural case hardened color.  Was case hardening a successful process? Relative to the steels being used at the time it was a successful method of hardening parts subject to wear. From the perspective of a metal "finish" case hardening color was only fair.  There are many examples of vintage revolvers, lever action rifles, and shotguns where the blued metal surfaces are near pristine condition and yet  many of the parts which where case hardened colored have lost most of or all of the color, leaving the surface silver.  This is further supported by results found by Brownells, Inc., the premier gunmsmithing industry supplier, who went to considerable expense a number of years ago to research the original color case hardening processes so as to be able to supply the trade with the materials and equipment required to replicate the original color case hardening. Among their findings where:
a.) traditional case hardening colors wear much faster then black oxide blued and rust blued finishes
b.) traditional case hardening colors will fade over time with exposure to light.

With the development of the Stampede single action revolver Beretta went  to considerable lengths to offer the shooter metal finish options which replicated the typical period finishes while offering a higher degree of durability combined with the strength advantages of modern steel alloys. The use of modern high strength steel alloys requires very sophisticated heat treating procedures which prevents Beretta, and other manufacturers, from  using the old traditional  "color case hardening" processes. Beretta has developed a special chemical process, "Beretta Color-Case",  to stain the surface of the steel in a manner which replicates the colors of "color case hardening". As many of the 
Stampedes see far more use by today's cowboy action shooters then the working guns of yesteryear,  Beretta introduced  a special clear coating which is applied over top of  the Beretta Color-Case finish as a value added feature to further enhance the durability of the finish.