selgasArt / Be Careful it's My Heart / 19(-?-) / Bola de Nieve

 

Ernesto Briel / Havana Jam

http://www.nytimes.com/2016/02/19/arts/design/op-art-through-a-latin-lens.html

Google to the rescue!...An optical drawing by ERNESTO BRIEL
as the official poster for the unique and peerless

1979 cultural exchange between Cuba and the USA.