Hi, Can anyone identify this Jar and lid. Measurements: H16.6cm x 14.3cm x 10.6cm. This Jar is very heavy and wondered what it may of been intended for. Weight 1.4kg. I first thought it maybe Sklo Union as the base lid area is very similar when design shape is considered. The base of the bowl area makes me think otherwise, that is, it may not be Sklo Union after all. The base of the bowl is a flat polished base with definite signs of ware. Any help would be appreciated.