Papillon DE METZ, September 1870, label in the size approximate 91 x 47 mm, dated "pres Metz . " to Romainville by Paris with Message "always suis heureuse de annoncer que always suis en bonne sante . ", from the from Germany besieged Metz flown out with small gas-filled balloon, to the Landing outside of the siege ring postal without further dust cover mailed with date stamp NEUFCHATEAU 17.9.70 with notation "Lettre parvenue en balloon" and direct to the consignee forwarded, accordingly custom traces, extreme rare early postal document the airmail, superb