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April 2026 Horological Journal
10 April 2026
This month we feature on the covers Patek Philippe’s Calatrava ref. 5328G, 8 Day Power Reserve with Instantaneous Day and Date, which is described further inside the edition in a special report by Justin Koullapis FBHI.
Also in this issue, David Poole MBE FBHI continues his ‘Let’s make a clock’ series, and Jon Clasper and Crispin Maciejewski delve into Gold and Silver Rolex Oyster Cases of the 1920s and ’30s to give a review of dating by case numbers.
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Below is a list of the articles available in the April 2026 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.
Gold and Silver Rolex Oyster Cases of the 1920s and ’30s
Patek Philippe Calatrava ref. 5328G
A Helping Hand for Students 95
David Poole MBE FBHI
Book Review
Bench View
Mike Flannery FBHI
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