Original W.W.II period R.A.F canteen coffeemug by Silicon China. Chunky white ceramic mug with "R.A.F." and Kings Crown in a blue circle to one side. This mug has a volume of approximately 1 pint. This mug was standard issue in R.A.F. station mess canteens.

You would be awake for several hours when you had your pint of caffeine coffee.......