Beadon flying suit emergency waterproof match container. 
Stores reference 12D/461.  By Nestor.  
Approximately 6.5 x 3cm.  
Screw topped cylindrical aluminium container housing a second aluminium tube into which large-headed, long burning matches are still present.  The inner side of the outer container is coated with a special 'striking-surface' most of which is still present.  
Condition: good condition considering age. A good majority of the inner special striking surface is still present as is most of the original label. There are also seven matches included which I assume are the originals.
Weight: 28 g.