Woodbridge Antiques has dated this piece to the 1950s.
The back of the brooch has the makers mark for Georg Jensen and 925 S Denmark. It also bears a number 113. The brooch has a good fastening pin on the back that works well.

A highly collectible and wearable piece for lovers of classic modernist design.
In very good vintage condition. c1950s
Measurements: Length 4.2 cm Width 4 cm Weight 12.1 grams
Weights and measurements are approximate.
Stock code: 42333
Woodbridge Antiques has dated this piece to the 1950s.
Specialists in quality antique silver, fine jewellery & accessories
You can view the stock and full dealer information on the Woodbridge Antiques Profile Page