No the pattern isn't mentioned in Ritz book. Was published in 1970 "Association Mouche et Salmonides" by Henri Pethe and again in 1975 in "Repectiore de mouche artificialle francaises" by Jean paul Pequegnot.
As far as a photo goes, I don't know too much about these boards. Do I just paste my pic to a message? The pic is only a B&W drawing. I have a bit on at the moment but will be back with the translated recipe a little later on.
Thanks