Interesting and beautiful cultivar with no or very few spines! Long tubercles with white wool, deep pink flowers!
This is an aberrant form or cultivar known in cultivation with various (more or less imaginative) epithets:
Mammillaria polythele f. nuda
Mammillaria polythele "sin pico"
Mammillaria polythele cv. JAN SUBA
Mammillaria polythele cv. TOLUCA
Mammillaria spinosissima cv. JAN SUBA
Mammillaria polythele f. inermis cv. STACHELLOS
Mammillaria tulensis v. stachelosus
Mammillaria hidalgensis f. suba
.... these are just some of the most common names used to indicate this cultivar on the market.