The Parker Parkers were bone charcoal case colored, while the Remington and Repro Parkers were cyanide colored... snip...
Are you sure about that?
My understanding is that Remington Parkers used the bone & charcoal method during their years of production, never cyanide. It was only after production ceased that Remington used the cyanide process to
REFINISH guns. The Parkers you see out there that are cyanide colored are refinished guns. I do not believe Parker Reproductions ever reported exactly what their process was for case coloring, some have speculated with uncertainty. If you've got some data to refute this, please correct me if I'm wrong.
