Hi Hope someone can help id this piece. Found in the North West of England it measures 12 cm x 11.5 cm c 6 cm (H x W x D) and weighs almost 800 gms. A narrow oval design with a polished rim and the base is slightly concurve from the edges to the centre. Any pointers much appreciated. The nearest I've found so far to the blue is a number of Scandi vases (in particular Sweden), but I could be completely off track there. Thanks