British WWI brass wound stripe.
The wound stripe was suggested by Sir Arthur Conan Doyle after seeing French soldiers wearing Wound stripes on their tunics. General Roberts approved this insignia and after 14th August 1916 the wound stripe was issued to soldiers who had been wounded in combat and up to 3 wound stripes were worn on the lower left sleeve of the tunic.
The Official wound Stripes were made from Russian braid but this proved to get dirty and go dull so many commercial badge companies made brass wound stripes like this on which could be removed from the tunic and polished.
This example is is supplied complete with the backing plate which is stamped with the maker's patent mark. A split pin fastener is also included.