Fair enough. It's all scribbles to me
Still, knowing who owned it and when might help work out the tangled knot of all this stuff. From what I gather:
Jörg Wilhalm Hutter seems to have mostly produced books in 1522/3. CGM 3712 was a compilation text copied together in 1556, perhaps by a freifechter named Sollinger, which contains these sword and buckler plays among older material, including Hutter's.
c. 1545 Jörg Breu the Younger made Cod.I.6.2°.4, which includes some of the same sword and buckler material on folios 14r-15v, for PHM.
So at the moment the reason we believe that the stuff in CGM 3712 came first is because it's surrounded by works by Hutter from the 1520's? Wouldn't a more elegant explanation be that it appeared first in Cod.I.6.2°.4 and was then copied by Sollinger? We know that PHM knew of Sollinger and the illustrations in Cod.I.6.2°.4 are far better than those in CGM 3712, and I get the impression that Sollinger was younger than PHM?