I think its a Mamm

That says it.

It might well be a Mamm, but when I enlarge it, I lose definition so its difficult to see clearly. It looks like the upper part of the body doesn't have many spines, though the apex is quite spiny/ Odd??
My feeling (gues sreally) is that it might be the "Un Pico" cultivar or something of that ilk.

I understand. Looking at the plant, I see a good bit of damage/abuse. The base typically one spine from the center facing down with a series of 20 radial spines around it. In the middle it appears that the radial spines are gone and there are 1-3 heavier spines. The upper spines are singular from the middle with 20 or so radial spines. I looked at 'Un Pico' and don't think it looks like it.