THE COLLECTIONS OF JANET & JACK THORNTON
Wednesday, 12 - Monday, 24 November 2025
A brass cased compensated pocket barometer-altimeter by Negretti & Zambra, London, No.12186,
Estimate: $100 - $150
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Lot Details
silvered dial engraved with 21-31" scale and 0-10,000 ft, convex glazed in a revolving milled rim with a fine index pointer. Dia.50mm. Maker: Henry Negretti and Joseph Warren Zambra, c.1870.
