I just today received a Zero Tolerance 0350 that I bought directly from Amazon.com. The description states that it is made of S30V and every review I could find repeats this except for a couple of mentions of a limited offering in ZDP189. Mine does not have any indication on the blade or anywhere on the packaging what steel it is. Is this just because S30V is a given on this model and the setup for laser etching the knife has changed since they introduced the ZDP model?