I'm not trying to prove that eastern european or polish sabre was not a precursor to a modern sabre, but I believe it's much more complicated than this - solingen and passau weapon production technologies, spanish moore influence, turks, mongols and etc. are all involved in this story.
Concerning guards - picture B shows typical muslim guard. Picture 16 - is it a mix of nimcha and karabela
? Picture 18 - seen many times on shamshirs.
Picture 17 is unique, but unfortunately this type of guard did not survive (I think ?) in post-Blucher times, and does not appear on all regulation patterns before it. Is it the only thing they did - they invented new guards for old swords ?
Again I would really see something of a common turkish (like in seljuk-mongol-ottoman) origin, and try to understand what are the changes in _blades_ that been made.
P.P.S. I constantly have arguments with caucasians who come with great classification of "foreign" iranian shamshir vs. "authentic" caucasian shashkas with the same idea that it's so hard to say definitely "here is something that have never seen before" - shashka is nothing more than a guard's type...