The movie was supposed to be set in the 18th century, yet there are German Shepherds in he courtyard. The German Shepherd came into being around 1900.
The voice-over clearly sets the action during the reign of Charles VI, who was Holy Roman Emperor between 1711 and 1740. During the post-hunt party, however, we hear parts of the inner movements of K.525 which was not published until 1787.