News · Jaeger-LeCoultre

Jaeger-LeCoultre gives its Moon a 36 mm pink gold case

The Master Ultra Thin Moon trades size for balance, with a 70-hour calibre and an Australian price of AU$36,400.

Hen & Mills Editorial · 4 min read · 20 October 2026

• Jaeger-LeCoultre has introduced a 36 mm pink gold Master Ultra Thin Moon, giving its combined moon phase and date a compact dress-watch frame.
• A silvered sunray dial, pink gold date pointer and starry moon display sit above the automatic calibre 925, which runs for 70 hours.
• Reference Q1242521 is listed in Australia at AU$36,400 including taxes, on a black alligator strap with a pink gold pin buckle.

The moon phase has a habit of turning a simple dress watch into a very busy one. A date scale, a painted sky and a little disc all have to fit somewhere, usually at the expense of calm dial space. Jaeger-LeCoultre has made that familiar arrangement feel unusually well judged by scaling the case and preserving the open area around its hands. The result is the Master Ultra Thin Moon in 36 mm pink gold, reference Q1242521.

The 36 mm case makes the moon phase the point

The new case is 18K pink gold and measures 36 mm across. Jaeger-LeCoultre's Australian product listing gives its thickness as 9.34 mm; the press material rounds that to 9.3 mm. Neither number makes this an invisible watch, but the proportions put the complication inside a genuinely compact dress case. Polished surfaces extend across the bezel and curved lugs, so the warm metal forms a continuous frame around the dial rather than a heavy border. Water resistance is rated to 5 bar.

The dial provides the needed restraint. Its silvered grey surface has a sunray finish that changes with the light, while gilt hour markers and faceted Dauphine hands tie it to the case. Jaeger-LeCoultre says one facet of each hand is satin brushed and the other polished. That small difference should help the hands remain distinct as the wrist moves. There are no large numerals or extra text blocks to compete with the display at six o'clock.

That lower display combines the moon phase with a pointer date. A slender pink gold hand reaches the numbered date track around the opening, leaving the main hands to do their work in the centre. The moon sits against a dark blue, starry field, with pink gold colouring that echoes the case. The arrangement is not a new complication, but its scale matters: at 36 mm the date remains readable without giving the moon phase the entire bottom half of the watch.

Calibre 925 keeps the back as interesting as the dial

Inside is Jaeger-LeCoultre's self winding calibre 925, with hours, minutes, seconds, date and moon phase. The latest version offers a 70 hour power reserve. In practice, that is enough to set the watch down on Friday evening and return to it on Monday morning without immediately reaching for the crown. It is a useful feature for a dress watch that may rotate with others, rather than a reason to leave its moon indication unattended for weeks.

The sapphire caseback reveals Côtes de Genève, bevelled bridges, blue screws and an openworked 22K pink gold winding rotor. Those are specific finishing details, not a vague promise that the mechanism is attractive. They also make the back a worthwhile contrast to the deliberately quiet front: the dial shows only what the wearer needs, while the movement shows the work hidden beneath it. Jaeger-LeCoultre says the calibre is designed, made and assembled at its manufacture in Le Sentier.

A black alligator strap keeps the case and moon display in focus. It uses an 18K pink gold pin buckle and is interchangeable, according to the brand. That is a practical choice: a watch in this form can change character with a strap without changing its core proportions. Black also picks up the darkest part of the blue moon field without trying to match its colour exactly. The lugs curve down towards the strap, an important visual detail on a small round case.

It is easy to think a smaller luxury watch only changes who can wear it. This one also changes the balance of the display. The date track is relatively prominent, but there is enough silver around it to make the moon feel like a feature rather than a crowded subdial. The warm gold, cool silver and dark blue remain three distinct elements. Jaeger-LeCoultre has resisted adding a second complication or decorative dial pattern simply because there was space for one.

The most persuasive detail is the relationship between the thin case and the practical reserve. Neither figure is extreme in isolation. Together, they make a watch that can sit comfortably under a cuff and survive an ordinary weekend off the wrist. The 5 bar rating is similarly sensible for daily splashes, though the alligator strap gives the clearest clue about its intended setting. This is a dress watch whose mechanical specification is useful without changing its character.

Master Ultra Thin Moon Pink Gold pricing and availability

The Master Ultra Thin Moon Pink Gold, reference Q1242521, is listed on Jaeger-LeCoultre's Australian product page at AU$36,400 including taxes. The page offers an Add to bag option and boutique availability. The brand has not stated a limited production number for this reference. It comes on a black alligator strap with an 18K pink gold pin buckle. The listed price is for that configuration; regional pricing elsewhere has not been used as an Australian conversion.