France, French Offices Abroad, Set of 4 letters : 1877-1900, 30c brown OB C. CONSTANTINOPLE/TURKEY on letter for Aleppo. June 1877 1863-1870, 40c orange OB GC 5079, C. ALEXANDRETTE and additional Turkish franking on reverse on letter to Marseille. September 1869 1871-1875, 5c green, 15c bistre and 80c pink OB GC 5118, C? YOKOHAMA on a letter to Paris. November 1874 1870-1871, 40c orange OB GC 5079, C. ALEXANDRETTE on cover to Marseille. February 1873