The leaves of block books were usually paired; this is the left hand side of the two plates signed "k". The watermark is a gothic Y with a trefoil tail; there is a copy of the book in the Royal Library, Copenhagen (lacking 2 leaves), which has a pair of gothic Y watermarks with a trefoil tail (similar to Briquet 9195-9197 but not identical to any of those). Allan Stevenson (in "The problem of the blockbooks", in Blockbücher des Mittelalters, Mainz, 1991) examines more fully the paper stocks of the Schreiber editions, and opines that the Copenhagen copy could be dated to c. 1469 on paper made at Ville-sur-Saulx.
Schreiber opines that the block book Apocalypses were copied from an exemplar of c. 1460-1465 with woodcut illustrations and manuscript captions; he remains uncertain whether editions I or III were produced first. The differences between the two editions are shown by the more clumsy engraving of this edition III and in particular the appearance of the eyes, "presque toutes des yeux de boeuf", according to Schreiber.
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