Printed 'Presidencia de la Republica' envelope, unaddressed with 1953 50c mauve, 1b rose, 2b violet blue, 3b green and 3b 70c brown 'First Anniversary of the Revolution' issue (SG 579/582 & 585) tied by straight line 'PRIMER DIA DE CIRCULACION 9 ABRIL DE 1953' cancel in black with the signatures of 'Hernan Siles Zuazo' and 'Victor Paz Estenssoro' the founders of the Revolutionary Nationalist Movement' below. The latter was also president of Bolivia on a number of occasions and both are shown on the stamps. The cover also has their names typewritten below the signatures. A fine item.