Strange: It looks much older than Blanchard, and has no resemlance to Blanchard. So it must have been made after Blanchard, meaning it is a copy made to look very old, including the cracks. Probably English.
I showed the silver mounted bow to several German experts who all agreed that it was certainly not made by a Nürnberger family member. I had my own doubts when I saw tool marks and shellac on the stick. Grünke just looked at pictures and said it was none.