Brass Folding Arm Protractor by Jones & Co., London in Case Early-Mid 19th C For Sale

This is a lacquered brass folding arm protractor by Jones & Co. of London, which I\'d date to the first half of the 19th century, so circa 1825. It is 6 inches diameter, with engraved scale, twin verniers and operated by a geared arm. It comes in it\'s original fitted circular mahogany case. Jones & Co. may very well be W. & S. Jones or Thomas Jones. Clifton does not record a Jones & Co.