B SGDG stands for Brevette Sans Garantie Du Gouvernment – which means that it was patented without guarantee from the government. – The Old Corkscrew – International Fine Antique Dealer

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A rare French straight pull corkscrew with a folding handle containing a cork press. This example is marked “PORT ?? B SGDG” on the top.

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A rare French straight pull corkscrew with a folding handle containing a cork press. This example is marked “PORT ?? B SGDG” on the top.

POA