Registered cover franked with 1903 2 x 5c orange and pair 10c orange & blue 'Arms' issue (SG 279/280) tied by SUCURSAL E MEXICO D.F. cds's dated 30 MAY 1906 with printed red on white 'MEXIQUE U.P.U.' registration label alongside. Addressed to AUSTRIA with transit & arrival marks on front & reverse.