Nautical Sextant Value Guide

This mid-20th century British nautical sextant represents the pinnacle of pre-digital maritime navigation, crafted from durable brass and precision glass. These instruments are highly collectible for their historical significance in allowing mariners to calculate latitude with superior accuracy compared to the earlier octant.

What Is Nautical Sextant Worth?

The typical price range for Nautical Sextant is $250 - $275 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• The clarity and alignment of the original glass optics and mirrors significantly impact the functional value.
• Presence of the original mahogany or teak storage box increases the collectible appeal and market price.
• The condition of the brass patina; collectors often prefer original aging over over-polished surfaces.
• Mechanical fluidity of the index arm and the legibility of the vernier scale markings.

How to Identify Nautical Sextant?

• Check for the manufacturer's engraving, often located on the arc or the brass frame, indicating United Kingdom origin.
• Verify the presence of all original components including the index mirror, horizon glass, and adjustable sun filters.
• Examine the scale on the arc for fine, hand-engraved degree markings typical of 1930-1950 production standards.
• Look for a fitted wooden carrying case which often features matching serial numbers or naval inspection stamps.

History of Nautical Sextant

Developed in the mid-18th century, the sextant revolutionized navigation by allowing mariners to determine their latitude at sea by measuring the angle between the horizon and a celestial body. It superseded the octant, providing a larger scale and greater accuracy for long-distance voyages.