I think Steinwald might have been there before WMF Ikora ? Perhaps that's where WMF got their ideas?
But yes, I have reclassified two of my pieces and am hoping for an hitherto unidentifiable lamp to be identified as Steinwald. But not there yet and there's something about the flatness of the base that means I have misgivings it will turn out to be Steinwald in the end.
I also have a gigantic vase that I have thought might be Kralik but never had confirmation. The only other one to match was signed Schneider and looked authentic, but I've never been able to confirm that.
The Ernst Steinwald stuff is an exciting piece of ongoing research.