Arnold & Son - Royal Collection - 1GLAS.B01A.C122S

HM Perpetual Moon

Main

Brand

Arnold & Son

Family

Royal Collection

Reference

1GLAS.B01A.C122S

Name

HM Perpetual Moon

Movement

Arnold & Son caliber A&S1512

Functions

Hours, Minutes | Moonphase

Case

Glass

Sapphire

Back

Open

Shape

Round

Diameter

42mm

Water Resistance

30M

Dial

Color

Black

Indexes

Stick / Dot

Description

The sophisticated HM Perpetual Moon is, indeed, a superb example of Arnold & Son's technical and artistic excellence. From the inside out, this new timepiece - with richguillochédials and three-dimensional big moon - surprises and delights. The 42 mm case is created in either 18-carat red gold or in stainless steel and houses the exclusive Arnold & Son mechanical hand-wound movement, the calibre A&S1512. The 27 jewel calibre offers one of the most accurate moon phases on the market, with only one day's deviation every 122 years - at which point a single push on the corrector will keep it in sync for another 122 years. The calibre is also equipped with a double barrel to yield 90 hours of power reserve. The present version has a stainless steel case and black dial.

Our customer's reviews

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January 14, 2026

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Excellente expérience avec ce professionnel. Très réactif et toujours disponible pour répondre à nos questions. Emballage parfait, extrêmement bien protégé et expédition très rapide. Je recommande ce professionnel à 100% !

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Everything’s really awesome!

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+++ Fast and Professional, I would definitely recommend and/or buy from them again.

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Alles perfekt

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It's rare to find such a fair trader. Thank you for the gifts too!

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Professional !! I received exactly what I saw at Chrono 24!! Perfect watch, perfect delivery everything!!

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Excellent, perfect communication, kindness, professionalism, understanding.

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December 22, 2025

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CHRONO 10:10 did an excellent job indeed. From the feedback to the purchase offer that was given within the hour on a Sunday to the updates regarding the shipment - the service was spot on all the way. The watch arrived in less than 24 hours after being sent (Destination: Germany) and was packed up very diligently with bonus items added. A small misunderstanding was handled very professionally and the costs were kindly covered by CHRONO 10:10 - no questions asked.

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