CONGO Scout Jamboree Mushrooms PROOF SET

Wonderful issue from Republic of Congo with theme mushrooms and celebrating the 2019 World Scout Jamboree hosted jointly by the United States, Canada and Mexico. Also with jamboree badges from these previous World Scout Jamborees:

Jamboree in Denmark 1924
Jamboree in United Kingdom 1929
Jamboree in Canada 1955
Jamboree in Greece 1963
Jamboree in Japan 1971
Jamboree in Australia 1987
Jamboree in Korea 1991
Jamboree in Chile 1999
Jamboree in Thailand 2003

This is a set of five progressive proofs comprising four individual colours plus one full colour composite. All these sheets are imperforated. Only 10 sets printed in this proof format !

The stamps are in perfect MINT NEVER HINGED condition.