WW2 Royal Navy Barr & Stroud Ltd MK-1 No.34 Naval Gun Direction Sight Binocular

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WW2 Royal Navy Barr & Stroud Ltd MK-1 No.34 Naval Gun Direction Sight Binocular:
$14263.29

TheWW2 Royal Navy Barr & Stroud Ltd MK-1 No.34 Gun Direction Sight Binocularwas a specialized optical instrument used as part of British naval fire-control systems during the Second World War. Manufactured byBarr & Stroud Ltd, a renowned Scottish optical engineering firm based in Glasgow, this sighting device played a vital role in improving the accuracy of naval gunnery.

Purpose and Role in Naval Gunnery

The Mk I No.34 Gun Direction Sight was not a standard pair of binoculars for general observation. Instead, it was a precision-mounted optical instrument integrated directly into a warship’sgun direction and fire-control system. It was specifically designed for installation aboard Royal Navy vessels such as:

Destroyers
Cruisers
Armed merchant cruisers
Transport and auxiliary ships fitted with defensive armament

These sights were typically mounted on stabilized platforms or director towers, allowing the operator to maintain visual tracking of a moving target despite the motion of the ship.

Function Within the Fire-Control System

During WWII, naval gunnery relied on coordinated teamwork and mechanical fire-control computer system. The process worked as follows:

Target Acquisition:
The sight operator used the binocular sight to visually acquire and continuously track an enemy vessel, aircraft, or shore target.
Range & Bearing Determination:
While separate optical rangefinders (also frequently produced byBarr & Stroud Ltd) determined distance, the gun direction sight was used to establish precise bearing and angular movement of the target.
Fire-Control Calculation:
The observed data—range, bearing, speed, and relative motion—was transmitted to the ship’s mechanical fire-control computer (such as an Admiralty Fire Control Table). These systems calculated:
- Elevation (gun angle)
- Deflection (lead for moving targets)
- Predicted impact point
Gun Laying and Firing:
The calculated firing solution was relayed to the gun crews. The naval gun operator adjusted:
- Shell type (armor-piercing, high-explosive, etc.)
- Propellant charge (where applicable)
- Elevation and traverse
Once aligned, the guns were fired either locally or by director control.

Design and Construction

The Mk I No.34 was built for durability and precision in harsh maritime conditions:

Heavy brass or alloy construction
Weather-resistant housing
High-quality ground optics
Fixed mounting points for director integration
Reticle markings for angular measurement

Unlike handheld field binoculars, this instrument was part of a fixed combat system and engineered for stability, accuracy, and repeatable precision under combat stress.

regarding the shipping of this item, as it is considered an overweight and oversized item. Shipping costs will need to be calculated accordingly.

Important Notice for International Buyers:Please be aware that import duties, taxes, and customs charges are not included in the item price or shipping cost. These additional charges are the buyer's responsibilities

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