Geometric speckled glazed ceramic vase

Charming vase with a rather original shape, composed of straight lines softened by rounded angles which are reminiscent of the art deco style but without the symmetry and a very beautiful enameling in blue tones, changing depending on the side, with speckled, fleecy effects, effects of sprinkling, dripping, while leaving the enamelling very smooth (these are the outdoor photos which show the real color). It is not signed but has a hollow number 13 underneath. It is very difficult for me to date it, I have never come across such a vase and my research has not yielded much. I can only say that it is not recent if we are to believe the traces of use under the base. Apart from these traces, this vase is in perfect condition. It measures 24 cm in height, 8.5 cm in width, 9.5 cm in depth.