A fine Motor Aneroid by Negretti and Zambra, British, circa 1920, nickel plated dial with scale from 27-31 millibars, rotating outer ring dial with ascent and descent scales from 0-2000 feet, blued steel needle, 6.5cm diameter bevelled lens, nickel plated case on mounting bracket with two drilled lugs, together with tan leather carrying pouch.
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