Adidas Trefoil - What the Logo?

Responsive image
source
Adidas-Logo-PDF
Vector-Vintage-Logo
Adidas-Girl-Logo
EPS-Vector-Logo
Golf-Logo-Vector
Adidas-Logo-Colour
Nike-Logo-Vector
Free-Vector-Logos
Logo-De-Adidas
Shirt-Logo-Vector
Adidas-Logo-Template
Balenciaga-Logo-Vector
Adidas-Superstar-Vector
Adidas-Clip-Art
Black-Adidas-Logo
Adidas-Font