In the 1960s, he met and assisted members of Euskadi Ta Askatasuna (ETA), then incipient, and designed the axe and snake anagram that was later used by them.
During the 1960s, he met and provided assistance to individuals involved in Euskadi Ta Askatasuna (ETA), a group in its early stages of development. He designed the axe and snake anagram that was subsequently adopted by ETA.