Riegelhaube are indeed typical of the Munich costume in the early 19th Century, but based on collected producers' notes it can be proved that Riegelhaube were also made in places like Augsburg or Regenbsurg.
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In the Gallery of Beauties of King Ludwig I of Bavaria is the portrait of Helene Sedlmayr, epitome of the "beautiful Municher," and is shown wearing a Riegelhaube.
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August Lewald wrote in 1835: "The so very popular Riegelhaube, which can be seen especially on the young Munichers' delicates faces, is a very peculiar headdress, which shows no similarity to any other in Germany."