Caisson diving bell barge built for the Admiralty for service in Gibraltar. Forrestt &amp; Co. Ltd., 1905 Catalogue, Page 59.
Forrestt &amp; Co. Ltd, Wivenhoe, Essex
<a rel="nofollow" class="external text" href="https://www.merseamuseum.org.uk/mmphoto.php?pid=BF73_001_079_060&amp;hit=155&amp;tot=225&amp;typ=cat&amp;cat=501,292,254">Mersea Museum</a>