Archives for November 23, 2017

Digital Compass Barometer Altitude And More

Antique NEGRETTI & ZAMBRA, LONDON Gentleman’s Brass Pocket Barometer Altimeter

From my Barometer collection: Here we have an Antique, NEGRETTI & ZAMBRA , Gentleman’s Gilt Brass Compensated Aneroid Pocket Barometer Altimeter, 1800’s! . Was a company that produced scientific (philosophical) and optical instruments and also operated a photographic studio based in London, England. Henry Negretti (18181879) and Joseph Zambra (18221897) formed a [...]