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Old 29th November 2017, 07:28 PM   #22
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Join Date: Nov 2004
Location: Upstate New York, USA
Posts: 705
Question Dating of Moro Twist-Core Blades

I wonder even more about at what time the twist-core pattern-welding first appeared in this area. In the example I presented in this thread, when I removed the broken shaft elements, the tarry mastic was still in place and there was old brown rust on the tang - and no evidence of recent corrosion products or of debris to suggest that this was also its state when it was mounted - likely a century ago. The nature of the oxide layer on the tang resembled the same patina often seen on a Japanese swords that are several centuries old.
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