Original Patentschrift - J. Heuberger in Bayreuth , 1900 , Winkelmeßinstrument , Kompass , Astronomie !!!

Original Patentschrift - J. Heuberger In Bayreuth , 1900 , Winkelmeßinstrument , Kompass , Astronomie !!! - Technics & Instruments
Original Patentschrift - J. Heuberger In Bayreuth , 1900 , Winkelmeßinstrument , Kompass , Astronomie !!! - Technics & Instruments
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