60 pf on 40 to 4 m on 2 fr airmail in perfect condition mint never hinged with 40 Iy (abridged certificate with photo Huylmans BPP), 41 y (signed on the base Matheisen BPP), 42 b (signed on the base Erdwien BPP, 43 Ix+y, 43 II (signed on the base Matheisen BPP), 44 y (signed on the base Matheisen BPP), 45 a (signed on the base Klein BPP), 45 b (signed on the base Matheisen BPP), 46 x+y (signed on the base Klein BPP respectively Matheisen BPP), Michel 505,--