Vintage ‘Stanley Polar Planimeter’ (Cased)

This early, British measuring instrument known as a ‘Planimeter’ was made by ‘Stanley’ and comes complete in its original velvet lined case. It is impressed on the side ‘STANLEY, Great Turnstile, Holborn, London’ along with the serial number ‘42971'  and appears to be in excellent condition. The case measures 22cm x 4,5cm x 3,5cm.