This calendar is inscribed to Albert Spindler, a noted German bibliophile. It was purchased by the Sackner Archive at the auction of his collection conducted by Hauswedell & Nolte in 2000. The woodcuts depict owls posing as humans, often reading or holding books. There ar 12 prints for each month of the year plus one additional print that might serve as a cover, -- Source of annotation: Marvin or Ruth Sackner.