I own a vase signed "W. Johanson Orrefors..." for a long time, and read the threads about the hairdresser/engraver years ago.
The only thing I wonder about is who actually made my vase. Though it is quite a distinctive design, I have only seen one more in all these years (in black and white), and it had the same engraving.
So as this Mr. Johansson obiously didn't make the glass himself somebody else must have designed and produced it...
Thanks,
Michael