E.T.A.
After some investigating, the writing at the bottom says 'Blue Onion', a 50's/60's pottery label.
Somebody was actually tossing this away!
How cute is it? I know it's old, but just how old? It has a little crazing and it's not terribly noticable. But not a chip, and not a crack. How kitsch!
So what's the mark at the bottom? Peace Onion? LOL!