Nageldorn Nail tower. A block of oak with 4 holes, in 3 of them there are substances for coach. In the holes, the size of coach was tested that were counted by hand. With a drill of the corresponding size, holes were made through planning and shaft, after which a training breed was put in the boatbuilding "Bruket" held by the boat builders Abraham Svensson and Petter Håkansson. Gift of 1st Librarian O. Walde, Hjerthammar.

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Photo credit: © EU/BT / Alamy / Afripics
License: Licensed
Model Released: No

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