Mammillaria polyedra?

I am not sure about the identity of this plant for the presence of the two central spines and some short radial....
No field data...

Ja, M.polyedra

Looks very much like a couple of polyedra I have under a Rog field number.

This is a very old plant from a very old collection....
Thank you Andrejpr (nice to see you again).

Thank you Chris.
Is possible to have some pictures of your Rogo plants?

I'm not sure if I have any already taken, but if it's not raining tomorrow, I'll go to the greenhouse and take some, and also look at my disorganised photo files.

We all have disorganised photo files.....

At last one sunny day before the rains come again! The north west of the country is having a terrible time, floods again, and now more rain for Xmas Eve and Xmas Day. Poor people.

So these are the two Rog 053 plants which I bought from Rogozinski when I visited his collection and sales house with Hugo in 2008 (I think). Rog 053 is from Teotitlán del Camino, Oaxaca.

The first plant,


and a crop from this one. The radial spines are less obvious in my plants, and central spines vary from usually 3 but often 4.


And my second plant of this collection.