Vintage deep plate, kiln unknown B

This is a vintage plate. (Kiln unknown)

Although there is no backstamp, there is a plate with the same rim shape from Gien, so we believe it is from the Gien kiln.

Condition: Craquelure is visible, but there are no chips or cracks, and it is in good condition.
Size: Diameter 21cm x Height 4cm
Era: 1970s~