The shape of the ewer or aftaba suggests Ottoman/Persian/maybe northern Indian
The script is not Arabic, Persian, Ottoman Turkish or Urdu. It is not Roman either. From my vantage point that leaves Armenian or possibly Georgian each of which is spoken in the region and has its own distinctive alphabet. I don't read Armenian or Georgian so can't help on the translation.
If you google "ottoman silver ewer sultan mahmud II" you ought to come across the image of an uncannily similiar ewer sold at auction in 2012.
The surface decoration is so similar that both pieces could be made in the same workshop. Let us assume that your item is Ottoman Turkish based on the attribution of the item sold at auction.
There were many accomplished Armenian silver smiths in Ottoman Turkey. See thread viewtopic.php?t=37437&start=20
This supports the Armenian hypothesis.
Have you checked to see if there are other stamps on your ewer - especially a tugra - the highy stylized name of the reigning sultan?
This looks like a fine item. I would have it identified at a museum which has staff who are competent in Ottoman silver
Hope this helps to some extent
Thanks for the post