Not sure if you were suggesting yours truly, John

- if so I hate to disappoint, and regret I'm unable to help. Lovely piece, but a modern creation and way out of my line of knowledge too.
Copper wheel engraving is mostly used for producing images of shallow depth and often compliments a design by adding contrast in the form of matte appearance.
Always possible I suppose that the deep areas were cut on a wheel and them enhanced with the copper wheel.
I've looked through my books but can't see any reference to Chester or Noble in connection with copper wheel or even cut work. Sorry.
Of course, you may have been referring to another Paul
