I found a New Zealand site selling a "Dörfler, stamped G. Werner" for NZ$730. Eventually I found
http://www.vivaceviolin.com/pp/Bows/.../VlnBw406.html which seems to further indicate that G. Werner is student grade bows made by Dörfler. On their
website, I found no information on the stamping of their beginner/student level models, though...
G. Werner bows seems to sell for USD150-500.
On Krusig I have nothing. Can't find anything online, no matter which of the German words for bow or bow maker I use in association with his name.