Puckerings has dated this piece to the 1910s.
The interior of the lid is lined with blue silk and printed in gold for the Indian retailer in Calcutta and Darjeeling; clearly exported for the Anglo-Indian market and have made their way back to England.

Excellent condition each napkin ring measures 1 3/4" in diameter x 1 1/4" with a combined weight of 1.75 Troy Ounces / 53.7 Grams. The box measures 3 1/8" x 2 1/2" x 2 3/8".
Item ID:39626
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Puckerings has dated this piece to the 1910s.
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