Vintage Portable Precision Wattmeter – Elliott Brothers Ltd, London – 1955

This is a lovely piece of mid-20th century electrical test equipment, and it actually has strong decorative appeal as well as collector interest.

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We have 2 selling together and separately see pictures illustration only price is for one ( £180 for both )

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Vintage Portable Precision Wattmeter – Elliott Brothers Ltd, London – 1955

A fascinating piece of mid-20th century scientific instrumentation, this Portable Precision Wattmeter (Dynamometer Type) was manufactured by Elliott Brothers (London) Ltd, one of Britain’s most important early electrical engineering companies.

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Housed in a handsome solid wooden oak case with hinged lid, this instrument was designed for the accurate measurement of electrical power in laboratories, engineering workshops, and power-generation facilities. The beautifully curved analogue dial measures kilowatts, with a precision needle indicator and adjustable zero control.

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Inside the lid is the original calibration chart and certification label, dated 26 November 1955, confirming the instrument was calibrated in absolute units and required to be kept level for accurate measurement. The instrument also lists the pressure and current windings used in its measurement system, demonstrating the meticulous engineering standards typical of the period.

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The side of the instrument retains its original Bakelite connection panel, with terminals for measurement circuits, while the front features a ventilated grille and sturdy rubber feet. The overall construction is both functional and aesthetically pleasing, making it an excellent example of British scientific design.

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Today, instruments like this are collected by enthusiasts of scientific apparatus, early electrical engineering, and industrial design, and they also make striking decorative pieces for offices, studios, or libraries.

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Maker History

Elliott Brothers (London) Ltd was founded in the early 19th century and became one of Britain’s leading manufacturers of scientific instruments, electrical measuring equipment, and early computing systems.

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By the mid-20th century the company was producing precision instruments for laboratories, universities, and power utilities. Elliott later played an important role in the development of early British computers and avionics systems, eventually becoming part of the Elliott Automation group.

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Their instruments are known for their robust construction, high accuracy, and beautiful engineering, making them highly collectible today.

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Condition

Good vintage condition with age-related wear consistent with use and storage.

Original wooden case probably oak with patina and minor wear

Dial and needle intact working moves freely

Original internal calibration sheet present

Untested as an electrical instrument and sold as a collectible display piece

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Approximate Date

1955 (based on calibration certification) although item may be older

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Dimensions

20 cm wide

19 cm tall

23 cm depth

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Perfect For

Collectors of scientific instruments

Electrical engineering enthusiasts

Industrial or steampunk decor

Film or theatre props

Office or study display

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Disclaimer:

This is a vintage electrical measuring instrument and is sold as a collectible display item only. It has not been tested for operational accuracy or safety.