I think I am becoming a porcelain collector!

These pieces are pretty interesting although I know relatively nothing about them. The one on the left has an Ohio Brass mark on the dome, the other one is unembossed and is MLOD.

I could really use some help here. I must admit that I am starting to gain an affection for some of these old crude porcelain pieces... I guess the first step is admitting you have a problem...LOL!

Any help is appreciated!