I thought long and hard about whether to make this post, because everything so far leads me to think that you are very trustworthy, and I may be wrong regarding what I'm about to say, but I'm not certain in the "039" blade's genuineness. W968 blades with any serial number 11-99 are 2 digits, not 3.
I've checked and cross - checked sellers in China, and limited my options to 3 that are trustworthy by multiple criteria validated by multiple facets (sellers, buyers, potential buyers, etc.). I'm fully confident in the blades I'm looking at. I didn't wanna make this into a real vs. fake thread, which I mentioned in my OP, but I wanted to speak up based on what I know. And as mentioned, I'm an auditor by trade, so professional skepticism an evidence - based conclusions are what I do.
I may be completely wrong about your blades, but I'm certain in my seller(s). You can see the DHS logo in the #55 blade wrapping I'm looking at, the other one, maybe it's the angle, idk. Furthermore, multiple people have cross checked the blades I'm looking at, and I trust their judgment. I've done way too much research and have way too much evidence to think otherwise.. And frankly, in the impossible case that my blades are fake, I'll live with it because I most likely will never be good enough to tell the difference.