405nm laser - Class IIIR or Class IIIB for <5mW?

I've been looking around for a 405nm laser pointer that is <5mW power.  From what I've read, I thought visible wavelength was considred 400-700nm for laser specifications, so, if a 405nm laser had output power less than 5mW, then it was a Class IIIR (old-system IIIA).

However, every time I've asked of the specifications on the danger label for such a pointer, they always say, "405nm, <5mW, and Class IIIB."

Since I've always known a Class IIIB visible wavelength laser to be >=5mW and <500 mW, this seems mutually exclusive.  I always assummed the manufacturer/seller didn't know what they were doing and I stayed away when they claimed both "<5mW" and "Class IIIB." But after several answers to this question as such, I'm beginning to wonder:

Is a 405nm laser an exception to the rule and considered Class IIIB even if the output power is less than 5mW?

Re: 405nm laser - Class IIIR or Class IIIB for <5m

No.
People always mislabel and make mistakes with these rules.