The glass has a polished pontil underneath, which indicates thats its from before year 1900, most like 1880'ish.
The tradition of ribbon cut glassware comes from the Stockholm hotel "Rydberg".
This hotel orders a larger collection of glasses and bowls where every piece was ribbon cut. This makes a "trend" where ribbon cut glassware became modern.
In Denmark, both Holmegaard and Kastrup Glassworks have made glass with ribbon cuts.
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