It was listed by Puckerings. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Puckerings has dated this Silver Cocktail Shaker to the 1940s.
Two pieces, with an integral strainer inside the shaker.

An usual design and about as smart as they come. Fully marked on the underside for Charles S Green.
Excellent condition measuring 3 1/2" in diameter x 8 1/4" tall.
Item: 43973
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Puckerings has dated this Silver Cocktail Shaker to the 1940s.
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