1p black & gold on deep violet BOOKLET with 'CONTIENE 20 SELLOS DE 5 CENTAVOS MINISTERIO DEL INTERIOR DIRECCION GENERAL DE CORREOS Y TELEGRAFOS' printed cover and 'CORREO AEREO' Airplane advert on back reading 'Utilicelo para sus comunicaciones y ganara tiempo'. The booklet contains 20 of the 5c orange brown 'Moreno' Typographed issue on chalk surfaced paper (SG 653b) in panes of four with printed interleaving. A superb example in exceptional condition. Very rare. (GJ #Carnet 800A)