China Blue & White Rice Grain Firefly Sculpture Tea Cup Ceremony Senchawan...

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I researched these and found the keywords that i used in the headline. I hope i have it right. Im sure someone looking for these will know.
Please notice two of the cups have pictured flaws. I don't see chips.
I actually got these from a Japanese person who lives in Japan. I don't know if that helps, but i wanted to mention it.
Meadures 2 3/8 in. Tall. And about 2 3/4 in. Across the top.