I am also of the opinion it is rather European blade, but it does not seem to be one of those typical custom-designed (decorated with etching "on Ethiopian requests"). 
The blade from Zlatoust dated 1853 could originally be a property of one of the cossacks or dragoons accompanying Russian envoys by the end of 19th century. Such blades are not common  on gorades... 
I saw one gorade with interesting - probably Persian or may be Turkish blade. I hope IŽll be able to post a photo later. But such combination is also not common.
		 
		
		
		
		
		
		
		
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