Puckerings has dated this piece to the 1910s.

Each is hallmarked for Birmingham 1910 together with the makers mark for the famous Gorham Manufacturing Co. Each measures 1 1/2" thick with a diameter of 1 7/8" with a combined weight of 63.9 grams or 2.05 troy ounces. Excellent condition.
Item ID: 32545
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Puckerings has dated this piece to the 1910s.
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