Out of the four Mesa EV's I have, only two have the BS sticker. The other combo and the Thiele have OEM's. Now get this, the early 84 IIC+ has the sticker and the later Imbuya IIC+ has the OEM !!! The Thiele is a Boogie logo for the MK IV, but it does not have a sticker either. There's no method to this madness. 8)