Mexican pottery

I found these at good will for .99 cents each. But the pepper shaker did had a small chip as I can see in picture 4

First pic is front side of salt shaker signed and the bottom with the cork. signed Mexico 380.1

I'm not sure what the initials are. NX?
2nd pic is the back side and the bottom without the cork

3rd pic is the front of pepper shaker and the bottom and 4th pic is back side of pepper shaker. The pepper shaker is signed CAT Tonala Mex 360