An original vintage black-and-white photograph by John Day, taken at Marham Pumping Station in July 1974, showing a mercury-arc rectifier complete with its glass bulb, control gear, and associated electrical apparatus.
This image documents one of the last generations of industrial power-conversion equipment used before the transition to solid-state rectifiers.
Reverse bears John Day’s copyright stamp and handwritten identification in his characteristic script, confirming authorship and authenticity.
A striking and scientifically significant photograph from Britain’s electrical engineering heritage.
Key Features
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Original gelatin silver darkroom print, taken and stamped by John Day
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Subject: Mercury-arc rectifier and control equipment
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Location: Marham Pumping Station, Norfolk
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Date: July 1974 (handwritten and stamped on reverse)
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Superb tonal quality capturing rare high-voltage apparatus
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Ideal for collectors of electrical engineering, industrial archaeology, or vintage power technology
Physical Details
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Medium: Gelatin silver photographic print
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Size: Approx. 8 × 5 in (20.3 × 12.7 cm)
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Reverse markings: “Copyright John Day” stamp + handwritten annotation
Condition
Excellent vintage condition.
Crisp image with deep tonal contrast; minimal handling marks; reverse clean and fully legible.
Shipping & Policies
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Free UK shipping
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Same-day dispatch if ordered before 10 am (UK time), next day otherwise
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International orders via eBay Global Shipping Programme
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Eco-conscious reused packaging
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Buy 2 or more items from my shop and get 5–20 % off your whole order — discount applied automatically at checkout!
Buyer FAQs
Q1. Is this a genuine John Day print?
Yes — it bears his 1974 copyright stamp and handwritten annotation on the reverse.
Q2. What is a mercury-arc rectifier?
A pre-semiconductor device that converted AC to DC power using an ionised mercury vapour arc — once common in pumping stations and power plants.
Q3. Do you stock other electrical engineering photographs?
Yes — I have additional original vintage electrical and industrial photographs by John Day and other mid-century engineers available in my shop.
Summary
A fascinating original 1974 John Day photograph showing a mercury-arc rectifier at Marham Pumping Station — a rare surviving example of Britain’s electrical power-conversion technology.
Highly collectible for enthusiasts of vintage technology, industrial archaeology, and electrical engineering history.
Part of my Industrial & Engineering Archive Series, documenting the machinery and systems that powered Britain’s 20th-century industry.
