It was listed by Corvidae Antique. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Corvidae Antique has dated this piece to the 1940s.
Marked ROLLED GOLD GERMANY on the underside of the head.

Size: Internal circumference is approx 6.5 inches when resting, the flexible design expands easily and retracts back when set in place, enabling a nice secure fit. The snake is 5mm wide.
Weight: 29.8g.
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Corvidae Antique has dated this piece to the 1940s.
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You can view the stock and full dealer information on the Corvidae Antique Profile Page