The pocket barometer having 1¾” silvered die struck dial, the upper portion marked with standard meteorological terms “Rain,” “Change” and “Fair,” and “Compensated,” the lower signed by the maker “Negretti & Zambra, London” with serial no “20140.” Rotating outer altitude ring operated from the crown calibrated 0–15,000ft, the inner scale calibrated in inches of mercury with a range from 18–31. Blued steel pointer set beneath a fine bevelled glass. The good quality lacquered brass movement driven by a 1¼” capsule driven movement of conventional pattern with bimetallic compensation to extension. Low barrel form case with central rib, suspension ring with pillar and crown, compensation port to verso.
The matching compass having Singers pattern mother of pearl floating card marked with cardinals and intercardinals, jewelled suspension, the lower part signed by the maker “Negretti & Zambra, London.” Suspension ring set to post with integral crown compass lock.
Substantial thermometer set in a bone enclosure, the register with both Celsius and Fahrenheit scales with ranges 0 to 40 degrees and 30 to 100 degrees respectively. Signed by the maker “Negretti & Zambra , London.”
The whole contained within its original leather over wood green velvet and silk lined case, the inner lid marked in gold block with the maker’s name “Negretti & Zambra, Scientific Instrument Makers, London” and N&Z logogram, the outer lid marked with initials “E.L.H.”, snap closure on a button release.
The pocket barometer and compass have been cleaned and serviced and retain virtually all original finish. The compass card shows minor losses. The barometer dial with some minor age related marks, the case retaining virtually all its original finish. The leather over timber travel case in exceptional condition having only minor marks to the leather exterior, the case interior retaining virtually all its original colour and vibrancy.
The pocket barometer has good sensitivity and function, the compass finds north easily the lock operating correctly. The thermometer thread unbroken, working and in generally good condition.
These compendia are not uncommon – this version though, in this condition and by this premier maker, is rare. It is a little more practical than most, the thermometer with its much more open scale easier to read. Certainly collectable.
Dimensions: 5″ long x 3½” wide x 1¼” deep
Stock No: CP0681