Puckerings has dated this piece to the 1920s.
The cup is hallmarked for London 1923 and the collar for 1920; this is common for individual components to have different date letters.

The hinged lid is inset with a lovely piece of period tortoiseshell with intricate silver pique inlay.
Once the cup is removed, the lavishly gilded interior is revealed.
Excellent quality and condition measuring 2 1/2" x 1 1/4" x 5 1/4" tall.
Item: 39480
Puckerings has dated this piece to the 1920s.
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