A very fine brass cased aneroid barometer by D. McGregor & Co Ltd as marked to the 6 1/2" ceramic dial dating to the late 1800's.
'CHRONOMETER MAKERS & OPTICIANS' 'TO THE ROYAL NAVY' 'GLASGOW GREENOCK. LIVERPOOL'
Scale measuring 25" to 31" of barometric pressure, thick bevelled glass, brass bezel and case, pointer with half moon and tell tale with brass knurled adjuster to the centre.
Mounted on a wooden back board 23cm diameter.
4" deep and weighing nearly 3 kg.