1918, the fine study of the "R.O.P.I.T." overprinted and surcharged issue for the reopening of some of the ROPIT agencies and anticipated revivial of shipping following the Allied Occupation of Constantinople in 1918, including 1918 (9 Sept.) Circular No. 2381a from ROPIT to Steamship Captains concerning the issue of these stamps, instructions for use and postal rates, proof sheets (15) of one hundred, fifity, or twenty-five of overprint only (2, different colours) and overprint plus surcharge for ½pi to 100pi., and a good range of the mint stamps (502) replete with multiples and varities. (518 items)