Enki bilal screen printing black thursday copy signed by. Bilal edition: desbois editions printing: screen printing numbered and signed on 301 copies, made on beautiful and luxurious thick 250g/m² vellum paper. Certificate stamps on the back, that of the publisher christian desbois and enki bilal this piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution