Rare double lever find.

I purchased this rare double lever corkscrew from a non-Ebay auction site. Marked DRGM; a German Patent marking. The only example I could find was an unmarked example in the book World Class Corkscrews with the description "Mme. Veuve Paraf's 1929 French patent with a different type of handle." This is indeed a rare piece which I will hold on to and use.