Sextant Value Guide

This antique brass sextant from the 1880-1920 era represents the pinnacle of maritime engineering before the digital age. Originating from the United Kingdom, these instruments are highly collectible due to their intricate mechanical design and their historical role in allowing sailors to determine latitude via celestial bodies.

What Is Sextant Worth?

The typical price range for Sextant is $350 - $400 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Condition of the optics and the clarity of the mirrors significantly impact the $350-$400 valuation.
• The presence of the original mahogany or oak storage case increases the item's market appeal and price.
• Completeness of accessories, such as additional eyepieces or colored filters, is a key factor in determining final value.
• Mechanical functionality, specifically the smooth movement of the index arm and the integrity of the vernier scale.

How to Identify Sextant?

• Check for a maker's mark or serial number engraved on the brass arc or frame, often indicating a UK manufacturer.
• Verify the presence of original components including the index mirror, horizon glass, and adjustable telescope.
• Examine the scale for fine engravings on the silver or brass arc, typically measuring up to 120 degrees.
• Look for a fitted wooden box, which was standard for protecting these precision instruments during the late 19th century.

History of Sextant

The sextant was invented independently by John Hadley in England and Thomas Godfrey in America around 1731. It quickly replaced earlier instruments like the quadrant due to its superior accuracy, largely because it could measure angles without being affected by the motion of a ship. This made it indispensable for sailors and explorers for centuries, allowing them to determine their latitude at sea by measuring the sun's noon altitude or the altitude of a star. Even with the advent of GPS, the sextant remains a reliable backup for navigators worldwide.