Tom,
Thanks for the links, I had come across these in my research and Gary's post regarding the Weyersburg history which I found very interesting. It makes sense to me that Gebruder Weyersburg certainly had the footing and the capability to produce an in house variation.

Roy's fantastic Axt shows exactly the same characteristics as the other limited examples. Its worth pointing out also that after days of searching online and every forum you can think of, the total number of daggers by this maker, you could virtually count on one hand!.
I had not read Denny.R comments on the other threads regarding this pattern crossguard until after I had posted, but it seems he came to the same conclusion that it is indeed unique.
Great dagger Roy and condition to match!