*British, Negretti & Zambra ‘Prospecting’ Compass and Magnifying glass, Pat no: 12777*
Approx measurements: 4.4cm diameter
Marked on back: “Pat no: 12777, Made in England, Negretti & Zambra, London”
Marked on inner lid with serial no: Y16
A unique early 20th-century compass, estimated to date around 1905 to 1910, crafted from solid brass and adorned with black enamel. Its hinged lid boasts an integrated magnifying glass of considerable strength, while the back of the compass bears the mark of esteemed maker Negretti & Zambra.
The compass features a 1½” engine-divided polished and engraved ring, graduated in degrees, with a steel needle suspended on a jeweled pivot. Luminous triangles denote north on both the chapter ring and the needle. Enclosed within a black lacquered brass hunter case, the lid is equipped with a ‘pebble’ magnifying lens. The inner lid bears the stamp “Y16,” and the reverse side is marked with “Pat. No. 12777” and “Made in England” at the top, with the retailer’s name “Negretti & Zambra, London” at the bottom. A lever on the side of the case activates the transit when not in use.
These compasses were presented in Francis Barker’s catalogue as being suitable for “travellers, prospectors, botanists, etc,” the magnifying glass useful for reading maps, examining plants, rocks, etc, and lighting fires.
*Condition*
In good original condition, the powerful magnifying glass is slightly scratched commensurate with its age but this in no way impedes its use. The lacquered case retains nearly all of its original finish with some signs of wear, mostly on the reverse. The compass needle swings freely and accurately points north, while the transit lock and needle brake both operate smoothly. Please see photographs as part of the condition report.
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