Jaeger-LeCoultre Q1142510 Master Ultra Thin Perpetual Calendar Pink Gold Eggshell Dial Watch

Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar – Ref. Q1142510

The Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar Ref. Q1142510 is a remarkable integration of one of horology’s most prestigious complications into a graceful, elegant dress watch. Crafted in 18-carat pink gold with an eggshell beige dial, this 39 mm timepiece delivers a rare balance of complexity, slimness, and timeless style. Ideal for those who appreciate traditional watchmaking refined with modern comforts.

Case, Dimensions & Material

The case is made of solid 18-carat pink gold, measuring 39 mm in diameter and approximately 9.2 mm thick, making it relatively slim for a perpetual calendar. It features polished surfaces and elongated lugs that help the watch sit elegantly on the wrist. Water resistance is rated at 5 bar (≈ 50 meters), which offers basic protection for daily wear. A sapphire crystal protects the dial, and the transparent caseback displays the movement.

Dial & Hands

The dial is painted in a soft eggshell beige tone, perfectly harmonizing with the warmth of the pink gold case. Hands are dauphine-style in gold finish, and there is a blue central seconds hand. The layout features classic perpetual calendar displays: day of week at 9 o’clock, date at 3 o’clock, month at 6 o’clock, and the moon-phase at 12 o’clock. The markers are appliqué hour indices, giving the dial clean legibility and an elegant finish.

Movement & Complications

At Q1142510 heart is the in-house Calibre 868, which includes perpetual calendar functions (day, date, month, year, leap-year), moon phase, and a “red security zone” to prevent damage when adjusting the calendar during restricted hours. It’s an automatic movement with 46 jewels, running at 4 Hz (28,800 vph), and it has a power reserve of 70 hours. The movement thickness is approximately 4.72 mm, contributing to the overall slim profile.

Strap & Wearability

The Q1142510 is fitted with a black alligator leather strap with a pink gold pin buckle. Strap dimensions include ~75 mm on the 12-o’clock side and ~120 mm on the 6-o’clock side, with a lug width of 21 mm. The strap is interchangeable. The overall combination of the warm gold case, beige dial, and classic strap creates a very versatile piece—suitable for formal events, business wear, or elegant evenings.

Technical Specifications at a Glance

• Reference: Q1142510
• Case Material: 18-carat pink gold
• Diameter: 39 mm
• Thickness: 9.2 mm
• Water Resistance: 5 bar / 50 meters
• Dial: Eggshell beige
• Hands & Markers: Gold dauphine hands, appliqué hour markers, blue seconds hand
• Movement: Calibre 868 automatic perpetual calendar with moon phase, 46 jewels, 70-hour power reserve
• Strap: Black alligator leather, interchangeable, pink gold pin buckle

Unique Characteristics & Appeal

• Full perpetual calendar complication in a slim, dress-friendly case—a rare offering that includes moon phase and leap-year adjustment.
• Refined aesthetic cohesion: warm pink gold and beige tones create a cohesive and understated elegance, contrasted subtly by the blue seconds hand.
• Updated movement improvements: The Calibre 868’s newer generation features better power reserve and smoother energy flow, improving user experience.
• Legibility and layout: Clear sub-dials, dauphine hands, and appliqué markers make for easy reading despite the busy functions.

Conclusion

Jaeger-LeCoultre’s Master Ultra Thin Perpetual Calendar Ref. Q1142510 is an exceptional dress watch that merges technical sophistication with elegant design. With its pink gold case, perpetual calendar complications, moon phase, and a beautifully harmonized dial, it delivers prestige, utility, and style in equal measure. It’s a superb choice for the collector who values both mechanical excellence and visual refinement.