The equation of time
The sun does not cross the meridian at noon exactly: depending on the season it runs up to sixteen minutes ahead or fourteen behind. Astro shows it on a ruler from −15 to +15, with an index sliding in a slot — not with a hand.
Creations · Astro
A clock inside a terrestrial globe that opens. Designed and made in 2014–2015 during the Brevet des Métiers d'Art, updated in 2019, shown at Baselworld in 2016: the first clock with a linear equation of time.
Click the globe to open or close it.
What the dial tells
The sun does not cross the meridian at noon exactly: depending on the season it runs up to sixteen minutes ahead or fourteen behind. Astro shows it on a ruler from −15 to +15, with an index sliding in a slot — not with a hand.
The small disc nearest the centre, its thirty-one days engraved in little circles, read by a steel hand.
The larger disc beside it carries three rings — the months, the seasons and the signs of the zodiac — and a single hand that goes round them once a year.

Baselworld 2016
Astro was designed and made at the Paris School of Watchmaking, then shown at Baselworld in 2016, the year of the AHCI Young Talent prize. The Model 1 is its direct heir.
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