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 17 duplex cds dated 24 JUL 1929 with 'Wyoming State' destination in manuscript and two line 'Platon M. R. Feicalini Aguas y Torreon' agents name handstamp in purple script. A very unusual and scarce item.