Today I bought this dish. Think it is Kang xi?
Greetings Peter
Please post sideview to show shape, and a shot taken at about 45 degrees, showing the shape (cross shape) of the foot rim, and the area in between the foot (any bubbles or indents).
PS: the lighting used for taking the photos is not ideal for viewing the actual color hues of blue pigment and glaze.
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Photos
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Probably Kangxi to Yongzheng also, judging by the rim shape and decoration.