Readers of this blog know that I feel next to nothing being offered by dealers based in Germany is authentically vintage. The Germans made everything for export; nothing was retained to be discovered in a "warehouse find" after the Berlin Wall fell. Truly vintage Halloween winding mechanicals are exceedingly rare. I haven't seen one I feel is unquestionably authentic since I personally examined a collection in Los Angeles in 2009.
Mark B. Ledenbach's vintage Halloween collectibles blog.