Steve, 
Does not appear to be walrus to me. 
Try to measure the angle of the growth grains and you will be able to tell the animal...called Schreger lines. 
I think you will find they are greater than 115 degrees...i.e. elephant. 
 
The age cracks look like what occurs in elephant as well. 
 
I have seen Persian items and Indian with Walrus handles though. 
 
Ric
		 
		
		
		
		
		
		
		
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