sentences:  In 1952, he had a disagreement with the direction of the Postal Services, which had retouched without his agreement the original matrix of a stamp bearing the effigy of King Baudouin.The stamp so issued was so mediocre that it received a bad appreciation from the press and was rapidly withdrawn from sale.Being in bad terms with the Postal Service, De Bast waited for several years before being entrusted again with stamp engraving.