Julie Cartwright Antiques has dated this piece to the 1910s.

Hallmarks on lid:
G&SCo Ltd for the Goldsmiths & Silversmiths Company.
Lion Passant.
London Assay mark.
Date letters "p" for 1910.
Spoon:
TB&S for Thomas Bradbury & Sons.
Sheffield Assay Mark.
Lion Passant.
Date letter "M" for 1954.

Dimensions jar:
Height: 9cm / 3.5 inches
Diameter: 7.5cm / 3 inches
Condition:
Very good.
Glass in perfect condition.
Postage:
PLEASE DO NOT FORGET TO ADD POSTAGE AT CHECKOUT.
Postage UK: £9 Special Delivery Next day.

Postage overseas: £30 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