A JAPANNED AND LACQUERED BRASS INCLINOMETER E. R. Watts and Son, London, dated 1941 With pierced triangular frame enclosing spirit bubble scale with spring-loaded pivot at the open end, engaging with the underside of the brass fine-screw helical drum scale divided into tenths of a degree for reading against a pointer applied to the top plate of the tall end, the scale end plate engraved CLINOMETER, LARGE, E.R. WATTS & SON, LONDON, 1941, No. 23071, in original shaped mahogany box stamped with repeat makers mark, serial number and date to lid. The box 28cm (11ins) long, 20cm (8ins) wide, 8cm (3.125ins) high. The London based firm of E.R. Watts and Son specialised in surveying instruments and was founded in 1856 by Edwin Watts. The business was incorporated in 1922 and merged with Adam Hilger to become Hilger and Watts in 1948.