Printed 'Escola Agricola Pratica Luiz de Queiros Est. De S. Paulo Piracicaba' S.P. official cover franked with single 1906 100rs green & orange OFFICIAL issue (SG O285) tied by PIRACICABA (S.PAULO) cds dated 21 SEP 1910. Addressed to SAO PAULO with AMBTE 2o TREM PAULISTA (2AT) travelling post office cds on reverse with SAO PAULO arrival cds. An uncommon issue on cover.