I'm 100% sure it's walnut.  Aged walnut will often get a reddish tint to it.  It also loses it dark brown/black color as it ages, giving it a light brown color, often with a red tint.
You have a perfect example of a stressed, slow-growth walnut. I'm guessing it has some pretty tight growth rings?
	
		
			
		
		
	
				
			You have a perfect example of a stressed, slow-growth walnut. I'm guessing it has some pretty tight growth rings?