These are special as intricate, cut blue glass and filigree pot metal.
1940's and larger at 1" square and 1/2" deep.
There are two so they actually would make great cufflinks with the addition of a proper backing.
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Unique Vintage Jewels, Buttons and Collectibles
COLLECTOR'S SPECIAL...SALE 20% off regular priced Vintage Buttons. . . discount taken off purchase orders.