Hi Sue, They were issued in the 1st world war(a total of 1355).Try the CWGC web site. There are five Robert Clarke's all killed in 1915.One was an Able Seaman the rest were all Privates. The link is cwgc.org1. There are thousands of Clarke's listed between both wars.
Bazzer
Clarke family tree, and connecting branches and roots, from Hampshire, UK to the Titanic + beyond. We have links for the name CLARKE obviously, but many others, see the whole list. If you think you have a link into our family tree, or would like to put out a request for genealogy assistance, email pauly @ this domain I will try to help... The site is also home to my blog, with links to all the things I like. All about me, my lovely wife and our amazing boys... Also the usual things, work, TV, running, ect ect, + links to my fun projects.