After the success with Gymnocalycium schickendantzii, how about these?
The flower is white, but with a pink eye and bronze lower petals. I can find a picture if it would help.
This one is similar, probably the same species, although by no means a clone.
Another Gymnocalycium
Another Gymnocalycium
--ian
Re: Another Gymnocalycium
Could be G. damsii?