Who was the first to use zdp189 for their knives?

Joined
Aug 28, 2008
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The first knife I saw with zdp189 blades was a William Henry Tom Brown Quest. After that Spyderco had a few models. If anyone has any more info I'd like to know. Thanks
 
William Henry was the first to use it here, in the USA IIRC.
Japan was already using it on some kitchen knives.....I think.
 
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