This is aLunds London Lever Corkscrew with a separate worm with lifting eye.
One side of the fulcrum plate is marked LUNDS LONDON LEVER FOR DRAWING CORKS. The other side LUND PATENTEE LONDON. around a coat of arms.
The worm is marked on one side LUND PATENTEE & MAKER. On the other side,56 &57 CORNHILL 20 RED LION ST. Cornhill was the factory, and Red Lion St. probably the retailing address.
It is in reasonable condition for its age. It was found in a damp place, and the steel had become rusty. It has had a light clean, and the surface is discoloured.
The worm is bent, but still has a good point.
In 1855 William Lund was granted a patent for 3 models, and this is one. It was a great success ,and several makers produced similar corkscrews.
The biggest problem of this design was keeping the worm vertical as it was being lifted by the upperarm. The hook on the end of the lifting arm moves in a curve and not a direct vertical pull. To overcome this, the fulcrum pivot is a slot, and the user is supposed to adjust the arm in the slot to keep the arm vertical. Failure to do so results in a bentworm.!