If you need one. Here is a MINT example. "Quartermaster's Comment":- While we know this to be a British Badge....it was worn and used by others, especially Cadet Forces. I remember wearing one like this at school and I think that they were used by Cadet Forces at Schools in South Africa? The wearer wore the one badge only on the left arm. He had to pass quite serious tests with thw wirelesses to be able to wear it.