hi, was browsing for something else but thought I would comment.
I had a very similar one last year, with 3 dogs or slender foals as some describe them, and the Prussian eagle (which has one head)as Silesia was part of Prussia.(now Polish as from ww2) Bohemia, as was Venice, was part of the Austro-Hungarian empire, and had the 2 headed eagle, which helps with identification.
research and publications in the past 10 years or so may be the main reason for the hike in prices. Previously, I believe Bohemia/Silesia was something of a black hole paperweight wise. sold mine for similar sum at specialist auction. (needed money for a long holiday!) my info comes from lots of research made to identify my pwt. bought mine thinking it could be st Louis and had a nice surprise. hope you find one too. regards Dudley