Ancient vase in turquoise blue opaline 18.5cm

This beautiful antique vase is made of mouth-blown blue opaline. It dates from the late 19th century. This vase probably comes from a glass and opaline factory such as meisenthal, vierzon, vallerysthal or portieux. I did not find any traces of this model in the catalogs in my possession. These collectibles are called "fairground opalines: dating from the late 19th century or early 20th century, these pressed-moulded glass opalines were sold at popular fairs or markets. The shape is delicate, nicely flared at the collar. This vase is decorated with fine torso ribs. In good general condition. Dimensions: 18.5 X 10 cm around. I report the trace of the blowing cane at the base and a deposit inside the vase.