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September 2025 Horological Journal

29 August 2025

This month, Jon Clasper and Crispin Maciejewski consider Rolex and Aegler’s other customers in a study of the widespread distribution of Rebberg movements and the different companies that sold them.

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Also in this issue we feature on the covers the Patek Philippe Perpetual Calendar desk clock with a 31-day run – it is part of the company’s ‘Rare Handcrafts’ series, where highly technical horology is combined with exceptional decoration techniques, many of which are on the brink of extinction.

Below is a list of the articles available in the September 2025 edition of the Horological Journal.

If you’re already a member we hope you enjoy them, if not sign up for membership and receive the Journal every month along with many more benefits.

Patek Philippe Perpetual Calendar Desk Clock

Justin Koullapis FBHI

A Helping Hand for Students 88

David Poole MBE FBHI

Rebberg Watches

Jon Clasper and Crispin Maciejewski

A Mix of Diverse Mechanisms

David Patterson

Bench View

Mike Flannery FBHI

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30 September 2026

October 2026 Horological Journal

The covers of the October edition of the HJ feature an intriguing table clock co-signed by East and Fromanteel, although the origins of its engraved case are the subject of deeper research. It is thought to be the first English full grande sonnerie clock, and one of the earliest English clocks fitted with a minute hand. Also in this issue, David Poole […]

28 August 2026

September 2026 Horological Journal

The covers of the September edition illustrate the watch with perhaps the earliest recorded written provenance. Dating from circa 1620 and predating the balance spring, the watch is signed Edmund Bull and is in remarkably original condition. Selected for the HJ to mark the closing down of the website of horologist and illustrator David Penney, read more here: Download […]

British Horological Institute

21/10/26

⌚ WATCH TASTER DAYS – 2027 DATES NOW AVAILABLE!Ever wondered how a watch works? Or thought about trying your hand at watchmaking? Now’s your chance!Our popular Watch Taster Days are running throughout the year, and dates for 2027 are now available to book!Join us at Upton Hall, home of the British Horological Institute and the Museum of Timekeeping, for a hands-on introduction to the fascinating world of horology.🔹 Enjoy beginner-friendly sessions with our professional tutors🔹 Get hands-on experience with real watches🔹 Discover the history and science of timekeeping🔹 Explore the Museum of Timekeeping’s remarkable collection🔹 Meet others who share your curiosity about clocks and watchesWhether you’re looking to try a new hobby, learn more about your own timepieces or explore a possible career in watchmaking, our Taster Days are a great place to start.No previous experience needed – just bring your curiosity!📅 2027 dates are available now.🔗 Find out more and book your place: bhi.co.uk/coursesandevents#Watchmaking #Horology #WatchTasterDay #WatchCollectors #LearnWatchmaking #BritishHorologicalInstitute #MuseumOfTimekeeping #UptonHall ...

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British Horological Institute

20/10/26

🔧 This week in the workshop at Upton Hall: Making Small ComponentsOur students are developing their practical skills on this four-day course, learning to make and assemble precision components using traditional hand tools and machinery.Working from technical drawings and to tight manufacturing tolerances, they’re gaining valuable experience in machining, shaping, forming and fitting components to create a functional assembly.The course provides a strong technical foundation for clock and watchmaking, supporting Constructing Clock Components (Unit D2) and preparing students for Constructing Clock & Watch Components (Unit D5).Great to see these essential skills in action in our workshop!Interested in developing your own horological skills? Find out more about the course here: bhi.co.uk/courses/msc#BHI #BritishHorologicalInstitute #Watchmaking #Clockmaking #Horology #UptonHall ...

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British Horological Institute

19/10/26

🔎 “I didn’t know you could have a job in this!” ⌚That’s exactly the kind of reaction we love to hear!On 28 September, the BHI attended a Careers Fair at Lincoln University Technical College, introducing students to the fascinating world of horology and the opportunities it offers.Dr Samantha Shave, BHI Education Lead, and Donna Millichamp, Membership and Short Course Administrator, brought along pocket watches, tiny watch movements and hands-on activities to get students curious.From examining movements through a loupe to discovering the many parts that make clocks and watches work, our stand proved incredibly popular with students and staff alike.Many were fascinated to discover that horology could become a career — and that professional training is available right here at the BHI!It was a rewarding day, giving young people a glimpse into a world they may never have considered before. Who knows? We may have inspired some future watchmakers and clockmakers! 👏Find out more about horological training and courses at the BHI: bhi.co.uk/courses#BHI #Horology #Watchmaking #Clockmaking #STEMEducation #CareersInEngineering #FutureWatchmakers #HorologicalTraining ...

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