A German steel sprung corkscrew known as the Columbus. This example is marked “DRGM” on both sides of the steel cap lifter handle and also “DRGM” on one side of the frame. The “DRGM” stands for Deutsches Reich Gebrauchsmuster.(German Empire registered design). Edward Becker patented this design of corkscrew in 1893. The sliding ring when pushed towards the handle allows the hinged frame to be opened for easy removal of the drawn cork. Perfect bladed worm circa 1895.