Jar - overlay glass

Material: Glass (probably multi-layered overlay glass).
Condition: Good used condition with age-related signs of wear and areas of gold wear. No visible cracks or chips.
Manufacturer: Unknown.
Dimensions: Height 17.5 cm, diameter 7.5 cm.
Shipping: Carefully and securely packaged shipping.
From my observation, the glass appears to be constructed of several layers: a colorless base layer, a white intermediate layer, and a cobalt-blue outer layer, which has been exposed by grinding and engraving. The final assessment regarding manufacturing method, material, age, origin, and attribution I explicitly leave to the experts at Catawiki.