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Alois Willenbacher und Rzebitschek
bei der Prager Kunstgewerbeausstellung 1836 (I)
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Freundliche Hilfestellung durch Stephan Andreewitch, https://www.andreewitch.com/
Die Existenz einer Jahresuhr, die mit Federkraft ein Jahr lang läuft, klingt heute nahezu unglaublich!
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