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					Originally Posted by  ariel
					 
				 
				A “crack” on the spine is the remainder of the upper junky layer of a wootz ingot.  Sometimes it remains empty, but sometimes it is filled with a silver wire. The trick of forging the ingot into the blade is to bring this part of  ingot to the  middle of the spine. Usually this “crack” is no more than ~10 cm long. I have never seen it going all the way to the tip. This would be a sign of a  superb bladesmith. Can you show it?  
The “crack is very  helpful if the  blade was oxydized and the wootz  pattern  is no longer  visible. Then  one can be sure that polishing and etching will bring the pattern back. 
			
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 I will take some photos of this weekend.