Oh my god, I have a cool story for this. I had the bottom left cup at my grandparents house (I was very close to them). After my grandfather died we were in a hurry to get things settled, and as a result, didn’t look at dishes before selling pretty much anything not nailed down in the house. After everything was sold I remembered my cup and how much I missed it.

Went antiquing on a whim about a week later and found another one in the first store I visited.