postage stamps of France, but these were denominated in centimes and francs instead of the local piasters, so beginning in 1885, some French stamps were surcharged in piasters, at a rate of four piasters to the franc.
Merson series was issued with the inscription "LEVANT", both as centime/franc, and with higher values surcharged in piasters. In 1905, 15c stamps in Beirut were surcharged with "1 Piastre / Beyrouth".
World War I forced the closure of all the post offices on 13 October 1914. After the war, only the office in Istanbul reopened, operating from August 1921 to July 1923. Stamps of France were again surcharged, with values from 30 paras to 75 piasters.
Four post offices also issued their own stamps between 1893 and 1903: Cavalle (present-day Kavala), Dedeagh (Dedeagatch, present-day Alexandroupoli), Port Lagos, and Vathy (Samos).