This is a Vintage World War 1/2 British Royal Air Force Tunic Jacket Button, which has a Very High Chance of having a Very Rare Escape Compass placed inside it so the pilot etc could use if they were shot down etc in Battle. The Button has not been opened to see or show that it is in there, but it has been checked and tested by useing another Compass along side and placed next to and on top of it, which created a reaction and caused the Compass Dials to move etc, so there for indecating a Very High Chance etc that this Button does hold a Rare Escape Compass inside it. So im sure that someone who knows more about these RAF Buttons or a World War Collector will know what im talking about and what to do next with this Very Rare find. So please take a Good look at all the pictures and my description very carefully, as this Button will be bought as seen and will be posted via Royal Mail. Also if you check you will see that these items sell for a Very High Price etc? Please Note that this item will be bought as seen, with no return or refund etc, thank you.