Congratulations to a very beautiful hunting sword. 
 
As far as I can judge from the pictures, the pattern becomes finer close to the edge as a result of elaborate hammering to increase the quality of the blade. 
Even close to the point the pattern becomes narrow. So I dont think this blade is a shortened whatever. 
 
It is imho a British or French hunting sword and probably a contract work for a British or French citizen, which lived in India or Iran. Or maybe a present to an European officer or so. 
 
I own an Indian Tulwar with a pipeback-blade oriented on a British pattern from early 19th ct.. So it was not too unusual for Indian and even Iranian smiths to make European edged weapons from wootz. 
 
If I remember correctly, Kalib Ali is the son of the very famous Assadallah and in this case your sword is a magnificent one. But he lived to early to make a hunting sword in shape of a German deer catcher and all of his longswords I know are curved. 
 
 
Roland
		 
		
		
		
		
		
		
		
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