Thank you so much, had read that about being referred to as Duhme's No. 1 pattern in a reference attached to another image. Would that mean that this particular pattern was produced by them or just marketed in their stores under their brand as it were?
Let me post a cropped turned and hopefully enhanced image of the retailer's mark to see if it's any easier to assertain. To the naked eye only the first letter was barely visible. Will also attempt to reshoot.
Thanks again to you both.