Anything on the floorplate? For now, look toward August Schler Suhl, possibly a Modell Nr. 1 or similar. I still can't get my August Schler Suhl reprint catalogue at my fingertips but I did locate a thread on mechanic Schler:

http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=235071&page=1

August Schler, or his clients, seemed to really fancy the sideframe reinforcement. Also Schler proffered examples that were to the max outfitted w/ reinforcement belts & braces.

Cheers,

Raimey
rse