ɔːlðˈoʊ wˈɜːk wʌz bˌiːɪŋ kˈæɹid ˈaʊt fɚðə pˈoʊst ˈɑːfɪs ænd tˈɛlᵻɡɹˌæfz, ɪt wʌz ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪt wɛn ðə dᵻɹˈɛktɚ hwˈɑːn ˈɛf. sˈɑːɹhi kənvˈɪnst ðə pˈoʊst ˈɑːfɪs ɐθˈɔːɹɪɾiz ʌvðɪ ˌiːkənˈɑːmɪk ænd sᵻkjˈʊɹɹᵻɾi bˈɛnɪfˌɪts ðæt pɹˈɪntɪŋ pˈoʊstɪdʒ stˈæmps æt kˈɑːsə də mˈoʊndə ɪmplˈaɪd.
Although work was being carried out for the post office and telegraphs, it was in 1908 when the director Juan F. Sarhy convinced the post office authorities of the economic and security benefits that printing postage stamps at Casa de Moneda implied.