Casuelas, part one

These Mexican clay pots are called casuelas. I've got another almost identical pot, different mark inside, will post that in a separate thread. Don't know anything about them. Every time I look for the pot, I see them with ring style handles, these are ear style handles, I've seen this type on Spanish casuelas, harder to find on Mexican casuelas. If anyone knows about these pots, or the marks, I would greatly appreciate the information. Thanks for looking!