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		#10 | 
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			 Member 
			
			
			
				
			
			Join Date: May 2014 
				Location: Rhineland 
				
				
					Posts: 378
				 
				
				
				
				
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			Thank you gentlemen. 
		
		
		
		
		
		
		
	I cleaned it with a small wire brush (for gimlets). Luckily the rust or patina was thick but very easy to remove. On other items it didn´t work with that method. Intererstingly there are remains of glasslike black material in some of the carves, which makes me think that maybe the structure was elaborated with a Niello technique. Best regards Andreas  | 
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