I have only seen (pics and in person) the "A" decal (a couple variations), never seen the "B" and have only read about it.
Maybe people didn't want to draw attention to something called "B" Quality and left the decals off.

You folks with Zeus frames: for posterity it would be useful to know what the OD of the seat tubes are, and the corresponding seat post that fits that tube. Might tell us more about whether they used only metric tubing and what the wall thickness of some of that tubing is.