A Chinese, sancai dish, Jin dynasty

A Northern Chinese, polychrome, dish from the Jin dynasty; C12-13th AD. Possibly, slightly earlier, and from the Liao dynasty.
Decorated with a floral motif, the interior is covered with a sancai-type glaze, whilst the exterior show it's buff-coloured paste.
Diameter, 14.8 cm
Condition; area of missing glaze to the interior; see photo. Some small abrasions to the rim.