Cactus treat - Coryphantha maiz-tablasensis

I have this
Coryphantha maiz-tablasensisVAR ?UKNOWN?



I bought it on ebay and the seller said that the old man that took care of them hasn't done so for a few years yet this survived in a green house.

Since then I potted them on a south-facing windowsill and waterd them very very lightly.
I know its currently a bit worse for wears but it has come a long way from the state it was in when i recived it.


After some basic research online I found that BCSS stands for ( British Cactus And Succulent Society )

Also the JL.203 on the label is a reference on a system which catalogues and indicates the location this particular cactus was collected from (JL203 is in mexico)
But no further information on this Variety or photos are available.

"The type-locality near Las Tablas in the Mexican State of San Luis Potosí is more and more endangered by intensified farming and large portions of the range have already been lost, the same is true for the few other locations known."


Any info regarding this variety would be a great help