SCHÖNER, JOHANN. Opera Mathematica. With prefaces by Philipp Melanchthon. Title in red and black with woodcut ornamental panels; woodcut portrait of the author on [beta]4v; 4 full-page woodcuts of celestial and terrestrial globes, armillary sphere, and planisphere; 11 diagrams with volvelles, fully functional except for the 2 on b5v, which are mounted in place; numerous text illustrations, horoscopes, and diagrams. [10], 218 [i. e., 222]; 172 [i. e., 169]; [3], 54, [2] leaves, including errata/colophon leaf and final blank; lacks the blanks 29/4 and ²[alpha]4. Folio, 306x201 mm, contemporary blind-tooled pigskin over wooden boards with brass catches and clasps, covers with Crucifixion/David/Resurrection/St. John roll dated 1541 around Lucretia/Caritas/Justicia roll dated 1556 and later stamp of the Schola Altenburgensis in center, spine slightly chipped at top; title gutter reinforced, blank upper outer corner off E4, gathering R lightly browned, few other leaves toned, underscoring and stain on leaf 6 in Tabulae astronomicae, tiny wormhole in blank outer margin of last several leaves. From the collections of Sir Robert Leicester Harmsworth (sold as lot 9605 in his sale at Sotheby's London, 9 February 1953) and Robert Honeyman IV (lot 2802A in his sale there, 19 May 1981). Nuremberg: Johann vom Berg & Ulrich Neuber, 1551