THIS FIRST EDITION IS VERY RARE. USTC and Von Gültlingen locate copies in Bayerische Staatsbibliothek and Herzog August Bibliothek, only; another copy is in the Bodleian Library. We have found just one record of a copy selling at auction in the last 40 years (Sotheby's, 21 June 1972, lot 746). Smith found no edition earlier than 1566 (Rara arithmetica, p.320); the earliest edition in the BNF is 1561, and in the British Library 1571.
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