Equipped with nothing more than a length of rope and a carpenter's adze, Shackleton and two crew-members successfully completed the journey in 36 sleepless hours.
Mr Kelly told reporters after inspecting it that a length of rope was looped around the piece of steel and that no marks were visible on the walls overhead.
It has a simple-to-move foot bar that lifts and clicks into place to reduce transition time between exercises, patent-pending collars on the springs to make them easier to grip when changing settings and a rope system that lets you adjust length with the pull of a lever.
The owner, an Indian, sold him all the rope he had in stock: forty yards of braided hemp, which Pereda examined at length, as if looking for loose threads.