Indistict markings but would appear to be a size 4, Stores Ref. 22c/976. The aertex cloth is in excellent overall condition showing only light use and soiling. Both rubber earpieces are in good flexible condition and the interior of the helmet/inner chamois donuts show only light use. The chinstrap has faded a bit but retains reasonable elasticity. All the goggle straps are good and the press stud poppers have virtually all of the original brown coatings. Faint Air Ministry marks. Unwired and without receivers. A very good example. Stock code H15870.