[Montevideo?]: Convención Nacional de Trabajadores, [ca.late 1970's]. First Edition. Striking poster produced by the CNT, the National Workers Union of Uruguay, demanding the release of union members held as political prisoners by the country's military dictatorship. Not separately listed in OCLC. Original photographic poster, offset printed in two colors on thin white stock, measuring 41.75 cm x 55.5cm (16.5" x 21.75"). Fine / A (unbacked).