National Registration Certificate belonging to Captain William Davies, Nefyn, issued to him in 1918 and identifying him as a British national. This certificate along with other official documents was stored in a standard tin metal box.

This document was brought to the attention of the U-Boat Project 1914-18 by William Davies's grandsons, John Davies, Denbigh, and David Davies, Mold, who inherited their grandfathers' documents and naval artefacts and kindly allowed us to share it.