Puckerings has dated this piece to the 1910s.
In turn this is beautifully inlaid with an intricate silver pique inlay

The glass itself is new (by Hilkinson), making it a perfectly usable desk accessory with a clear unblemished lens & a good magnification. Excellent condition, measuring 7 1/2" in length with the glass having a diameter measuring 3 1/2".
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Item ID: 33450
Puckerings has dated this piece to the 1910s.
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