Vintage Deep Dish - Unknown Kiln A

Vintage plate (unknown kiln).

There is no backstamp, but since Gien has a plate with the same rim shape, I believe it is from the Gien factory.

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