I thought I read here that Del Greco uses the cyanide process to get the correct colors for the Parker guns. Stevens must have used it also on the 311's etc. at the factory as they are very vibrant colors and unlike true bone/charcoal CC. Not like the torch applications either.
Chief
Cyanide CCH....
Yes, Del Greco did-does, Fox did (after 1910-11), Savage did, Stevens did, Parker did and on and on.........quite common....some of the Uberti and other modern Italian guns as well still do, as an example, some of the new Beretta S x S's with CCH look to be Cyanide treated...?......
The cheap single shot H & R shotguns/rifles did and the new company that builds them still does, New England Arms or whatever they are called.
There is a distinct difference between the color patterns of Cyanide and Bone/Charcoal......indeed, quite easy to spot.....
The real cheap Cyanide CCH jobs look almost 'layered' on.......
That's why a nice Fox or Sterlingworth or Parker that has bone and charcoal CCH restoration doesn't look quite right............