If it Exist than it was made for field usage .there must be some stamps/ marketings on it somewhere . The head stamps on the blanks should have markings / date IVI or something . If the blanks are original to the Bandolier they sould all be closely dated or the same . The same for the chargers/clips markings stamps should be similar . If there are big variations /miss match the bandolier has been repacked with what ever was handy . If the blanks are of the long type they are most likely were for auto fire arms( Vickers or brens guns) standard rifle blanks were usly crimped Ordinary recycled standard cases with a star crimp . As with any 303 ammo there numerous variations and head stamps. Researching is some times more interesting part of collecting .