Engrave your name on stone with the use of chemical HNO3

The letter Engraving after adIndian ink essin printed on copper for the portfolio Paris de mon Coeur Signed in the plate with the name of the artist Dimensions approximately 35 x 27.5 cm c. Bernard buffet la letter engraving black and white signed 1961 197 hand bernard buffet is a french expressionist painter composing both characters and figures of animals, nudes and landscapes.