It was listed by Julie Cartwright Antiques. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Julie Cartwright Antiques has dated this piece to the 1930s.

Presented in the original leather box lined with red velvet and cream satin. They have an excellent silver gauge .
Hallmarks:
S&Co for Selfridge & Co.
Birmingham Assay Mark.
Lion passant.
Date letter "O" for 1938.

Condition:
Excellent.
Dimensions and Weight:
Width: 4.5cm / 1.6 inches.
Height: 2.8cm / 1 inch.
Combined weight: 55g / 1.3 oz.
Postage:
PLEASE DO NOT FORGET TO ADD POSTAGE AT CHECKOUT.
Postage UK: £8 Special Delivery Next day.

Postage overseas: £15 International Signed For.
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Julie Cartwright Antiques has dated this piece to the 1930s.
You can view the stock and full dealer information on the Julie Cartwright Antiques Profile Page