Full-Size Steam


Ruston Proctor 4NHP Portable Engine No. 37692 of 1909 SO679

Manufacturer Ruston, Proctor & Co. Ltd
Model PSG class Portable Engine
Country of Origin UK
History Sold new to Agar Cross, Buenos Aires
Nominal Horse Power 4NHP
Works No. 37692, replated in 1913 to 43853
Year Built 1909
Condition Requires Boiler Work, Engine Complete
Asking Price £9,995

We are delighted to offer for sale, on behalf of the owner, Ruston Proctor No. 37692 4NHP portable engine. To be sold as a project requiring boiler work, this portable benefits from being in otherwise reasonably good condition with the motion able to run on piped in steam.

As with many portables entering preservation, there isn’t a huge amount of history to report on. Despite that, there is a little information in the history books we can mention! It was sold new as a 4NHP PSG class, plated as No. 37692 in 1909. The boiler number is 33499 which has been identified and allowed the owner to research it in a little more depth. The boiler number was associated with the above engine number from new, and that engine number was sold to agents Agar Cross of Buenos Aires, Argentina when new on 20/12/1909. There is a twist to the story however as the sales records suggest that on 25/5/1913, Ruston Proctor issued number 43853 to this engine, despite it already working in Argentina. Whether this is an administrative error, due to an issue with the engine or something more, we simply don’t know! It does, however, add a bit of a tale to its early life.

In terms of its life working in Argentina, there is nothing recorded. As a portable power source, this 4NHP, single cylinder engine could’ve been tasked with any activity ranging from farming to small scale power production. It is a slide valve type with a single flywheel.

We understand it made its way back to Britain toward the end of the 20th/early 21st century at a time when it was fairly common for such engines to be transported from that part of the world. Having been in the same ownership for around 20 years, it is now on the market. Although still requiring restoration, efforts have been made to turn No. 37692 into a showable piece. It has been cleaned and oiled with originality maintained where possible. The motion work runs and is free moving. It truly gives the distinct feeling of an engine which has just finished working a long life – the day it finished!

In order to return to steam, we understand that it would need a complete overhaul of the boiler which is clearly pitted externally where the cladding was previously containing condensation. Despite this, it has been priced taking into account the completeness and the ‘as found’ nature of the engine.

Overall, No. 37692 is an appealing engine which is full of character, and which certainly has a fascinating story to tell.

As with any steam engine or locomotive purchase, we would always encourage prospective buyers to employ the services of their own inspector to review the boiler prior to finalising any purchase.

Asking Price – £9,995

We always encourage prospective buyers to view vehicles and steam engines in person prior to purchase. This engine is advertised for sale by Berrybrook Steam & Classics on behalf of the owner and seller.

For the sake of viewing logistics, this engine is at our premises near Exeter, Devon for viewings. We ask that, where possible, all viewings are booked in advance by giving us a call on 01392 833301

Delivery can be arranged to anywhere in the UK, and beyond, at buyer’s expense.

The Company (Berrybrook Steam & Classics, trading name of Berrybrook Motors Ltd) offers the above details of this vehicle in good faith but cannot guarantee the accuracy of this information nor warrant the condition of the vehicle. A buyer should instruct their agents, surveyors or inspectors to investigate such details as the buyer desires validated. 

For Sale


Do you want to get involved in the world of steam? Are you considering buying a miniature steam engine? Are you stuck for a gift idea or are you simply looking for a good day out?

If so, we offer two different style days, tailored to suit your needs…

We offer a ‘Traction Engine Experience Day’, perfect as a gift and a fun day out learning a bit about what running a steam engine involves. We also offer a ‘Miniature Driving Lesson’ which is a half day course in the practical use of a scale traction engine.

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We specialise in the sale of steam engines and historic vehicles of all shapes and sizes! 

If you are looking to sell your steam engine or historic vehicle, we make both cash offers and sell on commission and would be more than happy to discuss the sale of your vehicle with you.

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Visit the official Berrybrook Steam & Classics online shop where we sell a range of steam-related products including gifts, parts and accessories for your miniature steam engine, gift vouchers for steam experience days and branded clothing!

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Milbury Model Company

We are delighted to announce the launch of our brand new partner website, the Milbury Model Company!

Our newest department is dedicated to supplying high-quality, brand new model and toy-sized steam engines, spares, accessories, gifts and more…

We are an official stockist for the complete range of Wilesco products which is sold from our Devon-based shop and is available to buy online.

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Looking to find out more about the preservation movement, traction engines, historic vehicles or our heritage?

The Berrybrook Blog visits a range of topics to interest all readers!

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We can help you sell…

We specialise in selling steam engines and historic vehicles of all shapes and sizes.

If you are looking to sell your steam engine or historic vehicle, we make both cash offers and sell on commission.

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*We are occasionally open on some Saturdays by prior agreement only – please ring 01392 833301 on a normal working day to arrange a visit.

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