John, I also vaguely remember seeing it sold as Loetz because I had owned one (chipped) and sold it, so noticed this for some reason.
I don't know if there is any evidence for these being Loetz though?
For some reason I thought it might be Kralik.
I don't think it is a 'version' of the 'boule-boule' decor.
Obviously I could be wrong on all counts though

Always open to correction.
m