Printed 'SERVICIO POSTAL MEXICANO' parcel post receipt form inscribed 'FORMA 9' and with 'Talleres Graficos de la Nacion - Mex.' printers imprint at lower right used with fine strike of SERVICIO AMBULANTE 217 duplex cds dated 30 JUL 1929 with 'Colorado State' destination in manuscript and 'Lino J Marmolejo' agents name handstamp in purple. A very unusual and scarce item.