M957 Banjo Barometer
Superb figured mahogany large size mercury banjo barometer. Swan neck pediment centered by cast brass finial, over hygrometer, over alcohol thermometer which can be removed by unscrewing the brass knob on the right side of the case (most unusual). Below that is a modern quartz clock behind the original opening brass bezel (it will run for over a year - accurately - instead of 30 hours, or 8 days).
12 inch silvered brass dial, bone set-hand knob, spirit level signed Lione, Somalvico and Co., 125 Holborn Hill, London - one of the best makers. Both the case and the thermomter box with cross banding.