Puckerings has dated this piece to the 1910s.
London W". The case is also lucky enough to remain in superb condition.

The silver cup weighs 46 Grams / 1.48 Troy Ounces and measures 1 5/8" in diameter x 2" and the case measures 2 1/4" in diameter x 1 3/8".
Item: 44512
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Puckerings has dated this piece to the 1910s.
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