Sink without screw holes

Presumably you need:
Washbasin bottle holder.

ah... for hanging up!

I would still assume something, because such a hanging variant doesn't seem sturdy... just speaking from gut feeling.

I also think that they are somewhat short and that the sink alone would be little stable with them. I am still looking for solutions. I will probably also contact a specialized plumbing company.

Hi,
they should actually hold, I learned GWS back in the late 70s.
Back then, there were still some mounts, either the tabs, alternatively there were also such brackets made of cast iron.
Just enter this item number on EBAY: 254191332504
Regards, Olli

Great, thank you! I will gladly take a closer look at that and try it out!

I found an item on eBay under the number and it looks interesting, possibly also in combination with the mounting tabs.

And nicely stick it to the wall with silicone. Sometimes you remove everything and the component still hangs firmly because of silicone everywhere.