Identity and Service Certificate issued by the British Mercantile Marine to Captain William Davies, Nefyn, in 1919. This certificate along with other official documents was stored in a standard tin metal box issued for the purpose.

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.