Cover franked with a single 1868 50c black on yellow 'Hidalgo' issue, pin-perf (separated by scissors) with '1 71' number and 'MEXICO' district overprint (SG 75, Follansbee #76) tied by FRANCO MEXICO cds. Addressed to FRANCE and rated '19' decimes on arrival with boxed 'G B 1F 60c' accountancy mark with various other transit and arrival marks on front & reverse. A very scarce issue on mail going overseas.