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Erhard Etzlaub sundial photograph by Drecker edited. Etzlaub's sundial Kompast or Compast Size of the instrument which seems to be kept in USA is mm br on the use of his sundials were given by Etzlaub in Codex ad Compastum Norembergensem which was kept by Staatsbibliothek Munich Germany but seems lost br there are only two of