Who Made this Beautiful Pot? Interesting Shape, Gorgeous satin Glaze~Unmarked?

Hello Again,
This is from yesterday's travels.
It's about 5+3/8" high, 5 inches in diameter
has a beautiful satin-flat finish, wonderful shape
hard to believe it's unmarked,.....but is it?
Written on the bottom in pencil is KV12,.......an indication of maker?
I love how the lip curves downward, and has a light band tucked underneath,.....very nice details indeed!
I hope you like it, and hope someone can tell me something about it.

Thanks and Good Day to All!
T