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Jaeger-LeCoultre’s 2025 copper-dial Master Ultra Thin releases are two distinct watches: the Master Ultra Thin Date Q1238460, with a simpler date display and a thinner case, and the Master Ultra Thin Moon Q1368460, which adds a moonphase and pointer date. Both have a 39 mm steel case, a grained copper-colored dial, a 70-hour stated power reserve and a reported limited edition of 800 pieces per reference.
How the Date and Moon differ
| Feature | Master Ultra Thin Date Q1238460 | Master Ultra Thin Moon Q1368460 |
|---|---|---|
| Movement | Automatic calibre 899; Fratello reports 32 jewels and Monochrome reports 218 components. | Automatic calibre 925; Fratello reports 30 jewels and Monochrome reports 245 components. |
| Dial indications | Central hours, minutes and seconds, with a date window at 6 o’clock. | Hours, small seconds, pointer date and moonphase at 6 o’clock; the moon appears against a blue, starry background, with the date arranged around the display. |
| Case thickness | 7.89 mm, often rounded to 7.9 mm in launch coverage. | 9.3 mm. |
| Reported launch price | Monochrome, November 17, 2025: €10,400. Fratello, November 22, 2025: €10,500, US$10,400 or £8,750. | Monochrome, November 17, 2025: €12,600. Fratello, November 22, 2025: €12,800, US$12,600 or £10,700. |
The movement figures are published specifications reported by Fratello and Monochrome, not independent test results. The launch-price reports differ; they should be treated as dated reporting rather than reconciled or current prices.
What they share
- Case and dial: Both use a polished 39 mm stainless-steel case and a grained copper-colored dial. Launch coverage says the texture changes its appearance with the light. Fratello describes it as softer pink in low light and more vividly copper in direct sun; that is an editorial observation, not a calibrated color measurement. Fratello cautions against treating the shade simply as salmon.
- Movement frequency and reserve: Both movements are reported to run at 28,800 vibrations per hour (4 Hz), with a stated 70-hour power reserve.
- Water resistance: Both are specified at 5 bar, or 50 m.
- Strap: Each is reported with an interchangeable brown alligator strap. Fratello lists 21/18 mm sizing.
- Edition size: Fratello’s 2025 reporting of Jaeger-LeCoultre launch information, corroborated by Monochrome, gives a limit of 800 pieces for each reference.
Which complication suits you?
Choose the Master Ultra Thin Date for a quieter dial
The Date keeps the display to central time, seconds and a conventional date window at 6 o’clock. Its 7.89 mm reported thickness makes it the thinner of the pair. It is the more straightforward choice if the date is the only additional indication you want.
Choose the Master Ultra Thin Moon for the added display
The Moon combines a pointer date with a moonphase and small seconds. Those indications make the dial busier and the case 1.41 mm thicker than the Date, based on the reported 9.3 mm and 7.89 mm figures. Choose it if the moonphase is a feature you value, rather than simply for the shared copper dial.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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Launch pricing and availability
Launch prices vary by publication and date, as shown above. Fratello reported online and select-store availability in its November 22, 2025 coverage. That report does not establish current stock, current official Jaeger-LeCoultre product-page status or present-day pricing. Check with Jaeger-LeCoultre or a retailer for current availability and price.
For an accessory, Fratello reports that the Moon includes a soft-tipped tool for its setting actuators. The coverage does not establish a compatible third-party tool. Before buying a replacement or alternate strap, confirm its material, dimensions and compatibility with the exact reference.
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- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
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