This item has always been with my Grandfather's Navy bits and pieces, and papers. I have no idea what it is. Answers on a postcard please... It may not even be a nautical thing but I don't know. Many thanks.
My Grandfather was only on Repulse during the world tour in 1923/24. He had retired and been recommissioned when Force Z sailed. Lovely to hear your uncle is still alive. I hope you've debriefed him for all his memories.