1960s Stadium Poject 4 safety helmet.
Manufactured by Stadium Ltd, 30-36 Queensway Enfield, England.
 
For display use only. 
 
Stadium Ltd were estblished in 1911 and were specialists of plastic moudlings including sunglasses, bowls and mugs to name a few.
In 1961, production turned to motorcyle accessories, helmets and 'Stadium goggles'.
 
Associated item/s:  Stadium goggles (not included in the sale)
 
Source: fergus & Gibbs