1940 Postage Stamp Centenary Centenary of the world’s first adhesive postage stamp, 6 May 1940. ArgentinaBulgariaBurma > MyanmarCubaDominican RepublicEl SalvadorEstoniaGreat BritainGuatemalaGuernseyLiberiaMexicoMorocco Agencies > MoroccoNicaraguaParaguayPortugalTangier > MoroccoBack to the Collections