Quadratum geometricum praeclarissimi mathematici.
Folio. 10 unnumbered ff. Title printed in red and black with full-page woodcut of the instrument in question (repeated on f. 2v) and numerous woodcut diagrams. Modern half morocco over red boards.
First edition of one of the rarest works by the Austrian astronomer and instrument maker. The "Quadratum geometricum", a new geodetic measuring instrument, was invented by Peurbach himself, and its use is here described for the first time.
From the library of Werner Habel, with his ownership stamp, signature and acquisition date (1977) to front pastedown. Previously in the collections of Count Wladyslaw Hrabia Bielinski and Zygmunt Czarnecki, with their stamps to title. Rare, only a single copy recorded at auction within the last 60 years.
VD 16, P 2054. Adams P 2270. BNHCat P 943.