A friend forwarded this to me. The source is a third party who posted the original query on Twitter.
Overall width is approximately two inches; sorry, this is the only pic I have. I've identified -- I think -- the blazon on the shield to the right: it's from the royal UK arms of Scotland. The left blazon might be Poland, but I'm not sure. The only other information I have is that this might be of WWII vintage.
Many thanks in advance.
Ben Hartley