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[6] leaves. 12x8¼, later binding of a 16th century manuscript bifolium on vellum; modern folding cloth box and chemise.

Only known copy of a recently discovered scientific incunabulum, being calculation of Easter tables. These tables are important astronomically, being based on the motion and phases of the planets. The first four leaves comprise eight pages of printed text, the last two leaves contain a double-page table in three parts. Undoubtedly produced in very small number, this is the only known copy of this incunable, recently discovered and listed - the citation referencing this copy in the Gesamtkatalog der Wiegendrucke is GW 0185620N.