This is the hat worn by winner Ayrton Senna da Silva of the Townsend Thoresen Formula Ford 1600 Championship, Donington Park, England, 15 August 1981.
The color is now faded, it bears the Donington logo. Ayrton signed it the way he ws signing end of the '70s and early '80s with his full name "Ayrton Senna da Silva"