Vintage  pair of Portable Precision Wattmeter – Elliott Brothers Ltd, London – 1955
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Price is for 2 selling together (one is slightly bigger and one has a bakelite attachment) and separately see pictures illustration only price is for one ( £180 for both  £95 each)
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Vintage Portable Precision Wattmeter – Elliott Brothers Ltd, London – 1955
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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 one 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
26 cm depth approx one is slightly bigger 
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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.