Dave,
Thanks for the info and a look at the native escutcheon plate. I would love to see the article you mentioned from the fur trade museum. The Crown GR escutcheon plate that I have a photo of comes from the private collection of an individual in Monroe, Michigan, who surface collected the house and blacksmith shop of a French-Canadian named Francois Deloeuil that was bulldozed for a housing development back in 1988. The site was salvage excavated by the Monroe County Historical Museum working with the owner and developer of the housing project. There are a great many musket/rifle/pistol parts like dragon (serpentine) sideplates, sideplate with a running dog chasing prey, lockplates, frizzens, cocks, ramrods, etc. Deloeuil (ca. 1760-1840+) worked for the British Indian Department in Canada during the Revolutionary War at Sandusky (a Wyandot Town) and at Shawnee Town (now Wapakonetta, Ohio).
If I get no takers on the Wilson article, I will go to the University of Toledo, register as a guest library patron, and order the article through interlibrary loan.
Pat