Kingsdown Antiques has dated this piece to the 1930s.
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Measurements:

Decanter:
Height: 7" (approx 17.5cm)
Width: 8" (approx 20cm)
Depth: 3" (approx 7.5cm)
Glasses:
Height: 2 1/2" (approx 6.25cm)
Length: 2" (approx 5cm)
Width: 1 1/4" (approx 3cm)
Total weight: 1630g
In good condition - no chips or damage to the glass.
Kingsdown Antiques has dated this piece to the 1930s.
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