21st China Adolescents Invention Contest

    Macau  2006.07.28

    In issue: Stamp(s): 4    Souvenir sheet(s): 1   

    Printing: multicolor, as one set block

    Issued in: sheets of 16 (4*4) stamps

  • Number by catalogue:  Yvert: 1316   Scott: 1197b  

    Perforation type: 14x14

    Subject:

    2 patacas. A collage with a picture of the Earth, a dish antenna and wind turbines