Thank you Matchlock, 
 
I ve not ability with photo programs ... but I can see what I can do.  
 
I ve asked information abaut the mark not abaut the authenticity of the item , it is already sure due to provenence , laboratory exams and study from different hight level experts in arms and armour .   
 
Thank you .  
BerberDagger
		 
		
		
		
		
		
		
		
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