1st auxiliary issue.
The Russian Post in the Ottoman Empire was a postal service of the Russian Empire that operated in various cities of the Ottoman Empire from the 18th century until September 1914. According to L. L. Lepeshinsky (1967), a total of 73 postage stamps of the Russian Post in the Ottoman Empire were issued; according to the Scott catalog, 231 stamps. The postage stamps of the Russian Post in the Ottoman Empire bore the inscriptions "Wrapper mailing to the East," "ROPiT," and "Eastern Correspondence."
In the mid-19th century, Russia carried on brisk trade with Turkey, which needed light-industry goods. Various fabrics, sugar, matches, etc. were supplied to Turkey. In return, it sent to Russia so-called "colonial goods"—coffee, tobacco, spices, and so on. Because there was no direct railway route, cargo was transported across the Black Sea. But Turkey had almost no merchant fleet. Therefore, the Russian Society of Shipping and Trade (abbreviated ROPiT) was established. In 1856, this society was also entrusted with the functions of the Russian post in Turkey.

ROPiT carried mail between various branches and also forwarded correspondence destined for Russia via Odessa. In 1863, ROPiT branches received a status similar to that of ordinary Russian post offices.
Postal agencies were opened in 20 cities of this country, through which the mail flowed. All postal items (wrappers, letters, parcels, money orders, etc.) were paid for with special stamps, the revenue from which went to Russia. Special stamps were also issued for sending mail to Turkey. They are called Levant stamps (for Eastern correspondence).
The first stamp, with a denomination of 6 kopeks per 1 lot (1/32 of a pound, or 12.797 g), was intended for sending printed publications to Turkey by wrapper: newspapers, magazines, books. It was issued in 1863. The rectangular stamp depicted a double-headed eagle in the center, and around it in a circle the inscription "Wrapper mailing to the East." The same stamp, printed in a different color, was issued a second time in 1866.
Several stamps were issued for sending letters from Turkey. Thus, in 1865 two miniatures of original designs were issued depicting a steamship and the Tsar's eagle. Instead of the words "postage stamp," which appeared on all all-Russian stamps, the inscription ROPiT was printed. Stamps with this inscription were issued two more times in 1866 and 1867. They were sold for Turkish currency, but their value was not indicated.
From 1868, the Tsarist government took control of all mail in Turkey and issued the first state stamps with the inscription "Eastern Correspondence," but without the Tsarist emblem. These postage payment marks were sold in ROPiT Russian postal agencies and were of various colors. They were overprinted with a new price. They remained in use until 1900. In that year, all-Russian postage stamps were issued with an overprint of a new value in paras and piastres. In 1909, such overprints were made on ROPiT jubilee stamps issued in Russian currency, but they did not enter postal circulation.
In 1909–1910, on these postage payment marks, in addition to the overprint of the new value, additional overprints were made with the names of 13 Turkish cities where these stamps were sold.
Later, overprints in Turkish currency were made on the then-current general-issue stamps of Russia.
Russian post offices were closed due to the outbreak of the World War in 1914, in which Turkey took the side against Russia.