Thank you all very much,this is far more response than I had hoped for and I will treat the knife with the respect it deserves. 
It is always good to find a forum where people are so happy to help ,some are not so good. 
I will post pictures of my katana for your interest.I have found out quite a lot about it and although it has been subjected to a hard life and is a shadow of its former self I like it.Both the katana and the Armdagger were gifts and for that reason alone they mean much to me. 
Thank you all again 
kevin
		 
		
		
		
		
		
		
		
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