Cover sent to Brazil on 20/MAR/1920, franked by Sc.O126 with two clover punch holes, postmarked "EXPEDICIÓN OFICIAL - SERVICIO NOCTURNO", with several transit and arrival backstamps, VF, rare! (Image)

Cover sent to Brazil on 21/AP/1920, franked by Sc.O126 with two clover punch holes, VF quality! (Image)

Large fragment of parcel post cover sent to Belgium, franked by Sc.O127 with two star punch holes, VF! (Image)

Cover of the Post of Uruguay sent to Bolivia on 20/JA/1923, franked by 3 examples Sc.O126 with 2 clover punch holes each, with several postal markings, VF quality, rare destination! (Image)

Registered cover of the Ministry of Foreign Affairs sent to Brazil on 7/AU/1923, franked by Sc.O120 x2 + O125, all with two star-shapped punch holes each, rare combination of two different issues! (Image)

Registered cover of the Presidency of the Republic sent to Paraguay on 13/DE/1923, franked by Sc.O126 x3 (one with defect) with two star punch holes each, rare destination, very nice! (Image)

Registered official cover sent to Buenos Aires on 1/AP/1924, franked by Sc.O126 with two clover punch holes each, fine quality, rare! (Image)

Cover sent by the Embassy of Bolivia in Montevideo to Argentina on 20/SE/1926, stampless, with blue handstamp "Diplomatic correspondence - Panamerican postal franchise", backstamped "OFICIAL Y PRENSA", VF! (Image)

Card of the Museum of Natural History sent to USA on 26/DE/1927, franked by Sc.O140 with star-shapped punch hole, VF quality! (Image)

Wrapper of the School of Medicine sent to Buenos Aires, franked by pair Sc.O147 with a clover punch hole each, VF quality! (Image)

Postcard sent by the Embassy of Brazil to Rio de Janeiro on 10/JA/1930, franked with regular mail stamp Sc.334 with a star punch hole, fine quality, very rare alone on cover! (Image)

Cover of the Post of Uruguay sent to Buenos Aires on 4/AU/1930, franked by a regular mail stamp Sc.304 with a clover punch hole, fine quality, rare! (Image)

Card of the Department of Agronomy of the University of the Republic, sent stampless to England on 14/MAR/1932, datestamped "SUC. A - MONTEVIDEO", fine quality! (Image)

Cover of the Ministry of Foreign Affairs sent to Argentina on 31/AU/1933 with marking "Correspondencia Oficial - Franquicia Postal Panmericana", and meter postage of 7c. along "OFICIAL Y PRENSA", VF quality! (Image)