25/JUL/1900 LA CARLOTA to Tucumán, registered cover with AR, franked with 40c., on back it has an arrival mark of 27/JUL, very fine quality, rare! (Image)

JUN/1901 VILLA ARGENTINA (La Rioja) to Buenos Aires, registered stationery envelope (total postage 30c.), the registration label is of CHILECITO, arrival backstamp, very fine quality! (Image)

Cover with corner card of "Confitería y Billares del León de Oro" sent by registered mail from Buenos Aires to Mercedes on 13/MAY/1909 franked with 22c., with rare registration label of "SUCURSAL 40 - BOEDO", arrival backstamp, VF quality! (Image)