PIERRE COURTIN (B.1921) *ECRITURE VERTE* RELIEF ENGRAVING FROM A HEAVILY EMBOSSED ZINC PLATE. 263 X 222 MM. JUNE 1961. RIVIERE 320, EIDTION OF 4.1057_PIERRE COURTIN (B.1921) *ECRITURE VERTE* RELIEF ENGRAVING FROM A HEAVILY EM