Almir Da Silva Mavignier was born 1925 in Rio de Janeiro Brazil and educated at Hochschule für Gestaltung in Ulm under Max Bill, a heady mixture to start with, if you aren’t familiar with his work he might be the best designer you’ve never heard of. He worked/works – I’m not sure – as a freelance designer and artist in Germany for 50 years, his work is a combination of ‘Konkrete Kunst’ and Op-Art. The website is a bit fussy (and in German) but the work, when you eventually find it, is cracking.