United Kingdom 1st Pattern Dispatch Riders Helmet

These first pattern DR helmets were made of Fibre with a cork "skull",  they saw service early in WWII until phased out by the new steel MkI models in 1942. 
This example has a tag "Made in England, Cromwell Protective  Headgear, Helmets Limited"  there is also a size stamp "7 1/8" and a number "No 102" stamped into the leather sweatband.