EXTREMELY RARE LORD KELVINS PATENTS TESTING SET No. 222 – VERY GOOD CONDITION. 222 with brass fittings on an ebonite panel in a polished Mahogany case with leather strap, made by Kelvin and James White Ltd, incorporating 50,000 multiplier and shunts 1/9, 1/999, 1/4999. The Galvanometer can be zeroed by the rotating lever. Museum Quality – A similar Testing Set is part of the Science Museum Group collection and in similar condition.