Ref. 2255

An interesting aluminium cased pocket barometer with winder top to adjust altitude scale divided from zero to 10,000 feet, by Dolland of London, compensated. The dial with minor marks but in good condition, aluminium showing signs of use on the back. Circa 1885, the use of aluminium in this period was due to its lightness particularly for mountaineering etc. First of this type I have actually seen although you do get larger more professional mountaineering type barometers, which were specially developed and made from aluminium for their lightness.