This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionBosun's call WW1.jpg
English: A well-used bosun's pipe from WW1 (or earlier), issued by the British War Office. It was owned by Petty Officer Ernest Frederick Holkham who was at the Battle of Jutland onboard HMS Acasta (1912)
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.