Congratulations on the acquisition of a truly superior example!
As to how an Ottoman blade found its way into an Indian hilt, we know that trade and gifts between the Turks and the Mughals were by no means rare.
Regarding its age, I suggest this blade was made in the latter 18th or early 19th century. The date is probably commemorative, rather than literal.
Remember that the Ottoman Navy was in its heyday until the very end of the 17th century; its conquests were surprisingly far-reaching in the early 1600s:
"In 1617 the Ottoman fleet captured Madeira in the Atlantic Ocean, before raiding Sussex, Plymouth, Devon, Hartland Point, Cornwall and the other counties of western England in August 1625.
In 1627 Ottoman naval ships, accompanied by corsairs from the Barbary Coast, raided the Shetland Islands, Faroe Islands, Denmark, Norway and Iceland. Between 1627 and 1631 the same Ottoman force also raided the coasts of Ireland and Sweden."
from Wikipedia entry on the Turkish Navy, see
http://en.wikipedia.org/wiki/History...e_Turkish_Navy
The kilic was a popular weapon with naval officers; at 27" long this blade would probably have been used at sea.
A very nice find indeed.
Ham