Julie Cartwright Antiques has dated this piece to the 1910s.
It is the large example. The pin cushion is designed as a newly hatched chick sitting in half an egg shell.
The chick is 'weighted' in such a way that, should it be knocked over, it will 'right' itself.

Hallmarks:
SM & Co for Sampson Mordan & Co Ltd.
Lion passant.
Chester Assay mark.
Date letter "O" for 1914.
RD number: 475678
Condition:
Very good.
Silver casing i. goood condition.
Velvet in good condition.
Dimensions:

Length: 4.5cm / 1.6 inches.
Height: 4.5cm / 1.6 inches.
Width: 3.5cm / 1.4 inches.
Delivery:
PLEASE DO NOT FORGET TO ADD POSTAGE AT CHECKOUT.
Postage UK: £7 Special Delivery Next day.
Postage overseas: £17 International Signed For.

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Julie Cartwright Antiques has dated this piece to the 1910s.
You can view the stock and full dealer information on the Julie Cartwright Antiques Profile Page