Brass fly buttons as used on R.A.F. battledress trousers etc. One has a small 'spike' to the domed centre on which the second magnetised button can be balanced. Small luminous dots on this button indicate North & South. Issued to aircrews to aid escape and evasion. Unissued condition. We have 1 remaining in stock as the photo but loose from the card. Stock code E16107.