Ken more than likely will have a better handle on the gold wash if he has seen one in high condition or it might be a pertinent question for master engraver Fredrik Frühauf in Suhl: http://www.gebrueder-fruehauf.de/ . But if I were to garner a guess, I would say it was typical in the Victorian era. Would a sportsman of the U.S. of A. have order it in that state? Anyone seen similar examples post 1900?

Kind Regards,

Raimey
rse