Hi,
Fortunately I can see the images, which is always hit and miss when using Google Images.
To me, rather than an overstruck maker's/retailer's mark, this looks like an attempt to obscure the actual maker's mark, not an uncommon action when the retailer wants to keep the origin of the piece unknown. Again, to me, it looks like just three strikes of a circular punch.
Others may see it differently.
Trev.