A 19th-Century brass surveying level, signed on the dial W.J. Young Maker Philadelphia., the silvered scale divided in 4 quadrants with variation setting and vernier scale, the blued-iron edge-bar needle with jewelled pivot, the shaped limb with twin wights, universal bubble level and counter, with universal staff mounting, in mahogany case - 14 5/8in. (37.2cm.) wide.