Marcus,

Thanks for posting another beautiful piece. I'm no expert on art but this does look vaguely Egyptian / Turkish / Arab in style to me from what I have seen of art from the region. The engraving is definitely not the kind that would have been ordered in India or other countries in South Asia even by Muslims in that region. Also, it is my suspicion that with the British dominating the Indian subcontinent in 1912, it is possible that this was ordered in a country that was close to Germany in those years. Or, maybe, a European aristocrat who had toured, visited or fought in that part of the world in the Great War could have ordered this with region specific engraving.

And, most importantly, congratulations to you and to your father, God Bless his soul. Please do post pictures of the restoration project as it proceeds.

Good hunting!