What is a marine chronometer?

A marine chronometer is a precision clock engineered to maintain exact time despite the motion and roll of a ship at sea. This accuracy was essential for calculating a vessel's longitude. These pieces were typically mounted within gimbaled brass bowls inside fitted mahogany boxes to keep the movement level. They represent the pinnacle of nineteenth-century horology and mechanical reliability.

How do pocket sundials and compasses work?

Diptych and folding pocket sundials utilise a hinged gnomon and internal compass to align with magnetic north, casting a shadow that indicates local solar time. They served as portable timekeeping backups before reliable pocket watches. Users adjusted the instrument according to latitude using folding brass arms and inscribed paper scales. They were carried by travellers and mariners for quick orientation on land and near coastal waters.

How do I care for brass instruments?

Brass navigational instruments require a stable environment away from high humidity and direct moisture to prevent oxidation and tarnishing. Dusting with a soft, dry cloth preserves the aged metal surfaces. Avoid using harsh metal polishes, as these can remove the historic patination and soften crisp engraved details. Wooden cases benefit from occasional treatment with appropriate wax to nourish the timber.

How are nineteenth-century telescopes dated?

Telescopes from the nineteenth century are commonly dated by examining maker signatures, barrel materials, and the number of draw sections. Early examples often feature engraved maker names near the eyepiece alongside mahogany barrels. Inscribed trade labels inside fitted cases and the transition from multi-draw brass configurations to single-tube designs provide further chronological clues. Comparing the address of the maker against historical trade directories confirms the production era.

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Maritime Navigational

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A maritime navigational antique is a precision instrument designed for the sea, offering a tangible connection to the historic methods of charting the world's oceans.

19th century

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Cased Telescope

From D J Green Antiques

£195

3+ MONTHS AGO

miscellaneous

Antique Ship's Clinometer, English, Brass, Maritime Instrument, H Hughes, C.1900

1900 - 1920

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Antique Ship's Clinometer, English, Brass, Maritime Instrument, H Hughes, C.1900

From London Fine Antiques

£1,395

3+ MONTHS AGO

miscellaneous

19th century

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A Large Desk Compass

From The Antique Partnership

£475

3+ MONTHS AGO

miscellaneous

Navisphère 8 Inch Celestial Globe, by Henri De Magnac

1900 - 1920

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Navisphère 8 Inch Celestial Globe, by Henri De Magnac

From Hatchwell Antiques

£2,800

3+ MONTHS AGO

miscellaneous

Early Twentieth Century Cased Barocyclonometer or Typhoon Barometer

1900 - 1920

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Early Twentieth Century Cased Barocyclonometer or Typhoon Barometer

From Jason Clarke Antiques

£3,500

3+ MONTHS AGO

barometers

19th century

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An Early 19th Century 2 Day Marine Chronometer by James Mccabe, No. 199

From Hansord Antiques

£5,400

3+ MONTHS AGO

clocks

Antique Three-draw Telescope, English, Walnut, Brass, Navigation, Georgian, 1790

18th century

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Antique Three-draw Telescope, English, Walnut, Brass, Navigation, Georgian, 1790

From London Fine Antiques

£1,675

3+ MONTHS AGO

miscellaneous

Ww11 Ships Telegraph Maritime Instrument,liverpool,c 1940

1920 - 1940

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Ww11 Ships Telegraph Maritime Instrument,liverpool,c 1940

From Curious Antiques

£895

3+ MONTHS AGO

miscellaneous

19th century

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Medium Sized Antique Sandtimer / Hourglass. 19th Century.

From Dragoncharger Antiques

£575

3+ MONTHS AGO

miscellaneous

Antique Cased Octant, Scottish, Ebony, Navigation Instrument, Sextant, Victorian

19th century

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Antique Cased Octant, Scottish, Ebony, Navigation Instrument, Sextant, Victorian

From London Fine Antiques

£1,195

3+ MONTHS AGO

miscellaneous

Object forms on this page include marine chronometers, telescopes, pocket compasses, sandtimers, and celestial globes originating from British and European workshops.

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Maritime Navigational

Cased Telescope

Antique Ship's Clinometer, English, Brass, Maritime Instrument, H Hughes, C.1900

A Large Desk Compass

Navisphère 8 Inch Celestial Globe, by Henri De Magnac

Early Twentieth Century Cased Barocyclonometer or Typhoon Barometer

An Early 19th Century 2 Day Marine Chronometer by James Mccabe, No. 199

Antique Three-draw Telescope, English, Walnut, Brass, Navigation, Georgian, 1790

Ww11 Ships Telegraph Maritime Instrument,liverpool,c 1940

Medium Sized Antique Sandtimer / Hourglass. 19th Century.

Antique Cased Octant, Scottish, Ebony, Navigation Instrument, Sextant, Victorian

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