1970s Chairs- ID and resources?  

These were purchased in Germany, along with a large group of Danish teak pieces in the early 1970s. The coverings appear to be wool or a mostly wool blend and the frames are a lightweight but hard composite or Fiberglas. They have a short square wood base and no markings anywhere. Any ideas as to designer or manufacturer? Also, any suggestions on the best resources, online or otherwise, for tracking down this kind of information on unmarked furniture pieces? Thank you.