Harrington Antiques has dated this piece to the 1910s.

The leather case bears the initials 'J. O. S' with the same initials and the date of Christmas Day 1915 naively yet neatly engraved to the top ring of the beaker.
A really lovely thing.
Dimensions (extended):-
Height: 6.5cm
Diameter of top: 5.25cm
Diameter of base: 3.75cm
DELIVERY
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Harrington Antiques has dated this piece to the 1910s.
Antiques & decorative interior pieces.
You can view the stock and full dealer information on the Harrington Antiques Profile Page