Interesting pieces,the S/245 36 is possible the grips were replaced, the blade looks from left side like proofed to sharpen?, but maybe its only on the pictures, the locking nut could be too a replacement. The frog looks nice.
The second one Durkopp could be too with replaced grips,as both material of grips were used, there could be only assembly numbers help.
Lastly a nice J.Sch. piece even 38 with wood grips, with web frog of similar color as previously reported. b.r.Andy