English, c.1890, the dial marked 'Surveying and Mining Aneroid Compensated NEGRETTI & ZAMBRA LONDON 8911' with geared scale running 0-4000 ascent and 0-2000 decent, and second geared vernier scale with magnifier, in polished aluminium case 12cm diameter
Note: responds well to the bag test
Sold for £150
Result including buyers premium
English, c.1890, the dial marked 'Surveying and Mining Aneroid Compensated NEGRETTI & ZAMBRA LONDON 8911' with geared scale running 0-4000 ascent and 0-2000 decent, and second geared vernier scale with magnifier, in polished aluminium case 12cm diameter
Note: responds well to the bag test
Auction: The Fine Collectors Sale, 12th Mar, 2025