Sketch by Albrecht Durer, 1511, probably drawn from memory.
Tools shown on the cheek of the press are the same Y-shaped tool shown in the Ascensius press marks, and a pair of dividers.
Durer’s sketch. although it shows the screw running in the wrong direction, seems to be done from observation. (Durer was the godson of Nuremberg printer and publisher, Anton Koberger, and had a press in his home.)
In the well-known 1628 copperplate engraving published in Haarlem by Peter Scriverius, the scissors, dividers and paste-brush are shown again on the head of the press. In this engraving, called “the first accurate representation of a press,” the mysterious tool of 1520 is not shown.
A hammer or mallet is shown hanging from the left cheek of the press, used of course for planing the form and setting the quoins and sidesticks.
Sidesticks were strips of wood or metal; when wedged against quoins, they secured one side of a locked-up page.