Julie Cartwright Antiques has dated this piece to the 1880s.

Charles Washington Deakin & Stephen Deakin traded as Deakin & Nephew between 1879 and 1881.
Stephen Deakin was Charles Deakin's nephew. Charles Deakin retired in 1881 and the company became Deakin & Francis.

Hallmarks:
D&N for Deakin & Nephew.
Date letter "f" for 1880.
Birmingham Assay mark.
Lion Passant.
Duty mark.
Condition:
Very good.
Good hinge on both vinaigrette and grille.
Good clear hallmarks marks.
Dimensions:

3.5 cm x 2.5 cm x 0.8 cm.
Postage:
PLEASE DO NOT FORGET TO ADD POSTAGE AT CHECKOUT.
Postage UK: £7 Special Delivery Next day.
Postage overseas: £12 International Signed For.
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Julie Cartwright Antiques has dated this piece to the 1880s.
You can view the stock and full dealer information on the Julie Cartwright Antiques Profile Page