Help me ID these beauties, please

Hello! I have a couple of mammillarias. Could someone help me ID them?

#1


#2



I wonder if this is a mammillaria
#3

Without flowers, it is difficult to ID plants.
I have doubts as to whether number 1 is a Mammillaria. Number 2 is a Mammillaria, number 3 is a Rebutia (or perhaps) Sulcorebutia.

Wolter ten Hoeve.

Hi! Number 1 is some kind of Thelocactus and number3 is a Rebutia krainziana, but it would be easier with flowers.