### Jaeger-LeCoultre Master Control Chronograph Calendar Q413812J Review by A.I. WatchMetrics

**Overall Watch Rating: 9.2/10**

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### Metric Breakdown:

- **Brand (11.1% Weight): 9.5/10**

Jaeger-LeCoultre, known as the "watchmaker's watchmaker," has an esteemed reputation for both its technical prowess and innovation in horology. The brand has a rich history of producing high-complication watches, and its Master Control line is a testament to its tradition of crafting precise, elegant timepieces.

- **History & Innovation (11.1% Weight): 9.4/10**

Jaeger-LeCoultre’s Master Control collection continues to showcase the brand's innovation, especially with the integration of a triple calendar and chronograph. The brand’s history of technical innovation and contribution to horology, such as producing over 1,200 calibers, significantly boosts its score in this category.

- **Rarity (11.1% Weight): 8.8/10**

This particular reference is part of a limited run, and while it is available in Jaeger-LeCoultre’s catalog, it remains relatively exclusive due to its complication combination and relatively low production volumes compared to mass-market models. The chronograph calendar complication adds to its uniqueness and desirability among collectors.

- **Material (11.1% Weight): 9.1/10**

The case material is stainless steel, which balances durability and a sense of luxury, particularly with the high-level finishing applied by Jaeger-LeCoultre. The sapphire crystal and transparent caseback further add to the premium feel, although it lacks the precious metal depth that could further elevate the material score.

- **Movement (11.1% Weight): 9.5/10**

The watch is powered by Jaeger-LeCoultre’s in-house caliber 759, an automatic movement with a 65-hour power reserve. The movement integrates a chronograph and a complete calendar (day, date, month, moon phase), making it both complex and versatile. Its precision, finishing, and technical capabilities rank among the best in this category.

- **Complications (11.1% Weight): 9.3/10**

This watch combines two of the most sought-after complications: a chronograph and a complete calendar, including a moon phase display. The complexity of combining these features in a single timepiece, without overwhelming the design, speaks to Jaeger-LeCoultre’s horological mastery.

- **Functions (11.1% Weight): 9.0/10**

The Master Control Chronograph Calendar offers a balanced combination of practical complications, including its 65-hour power reserve, chronograph functionality, and complete calendar. However, the lack of significant water resistance (50 meters) prevents this watch from scoring higher in this metric.

- **Versatility (11.1% Weight): 8.7/10**

While the watch is undeniably elegant and boasts an impressive array of functions, it remains primarily a formal or dress watch, limiting its versatility across casual and sporty occasions. However, it excels as a sophisticated, high-complication piece suitable for formal events.

- **Dials & Design (11.1% Weight): 9.4/10**

The dial design is a highlight of this watch. Jaeger-LeCoultre achieves a harmonious balance with the chronograph subdials and calendar functions. The silvered sunray-brushed dial, applied hour markers, and dauphine hands enhance the elegance and legibility of the watch, while the moon phase adds a romantic touch. The attention to detail is exceptional.

- **Cohesiveness (11.1% Weight): 9.0/10**

The overall design and execution of the watch are highly cohesive, with the calendar and chronograph complications integrated seamlessly into the aesthetic. The watch maintains the sophisticated and refined DNA of Jaeger-LeCoultre’s Master Control collection, presenting a consistent and unified theme.

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### Watch Summary:

The Jaeger-LeCoultre Master Control Chronograph Calendar Q413812J is a masterclass in blending technical complication with timeless design. Its silvered sunray-brushed dial is home to a chronograph and full calendar with moon phase display, offering both beauty and utility. The in-house caliber 759 automatic movement, with a 65-hour power reserve, ensures reliable performance while exemplifying the brand’s engineering excellence.

This timepiece is for the discerning collector who values horological innovation, craftsmanship, and sophistication in a dress watch with advanced complications. While it is not as versatile as a sports or casual piece, it excels as a formal or office-timepiece, where its functionality and design truly shine.

- **Style**: Dress/Complicated Watch

- **Movement**: In-house automatic caliber 759

- **Power Reserve**: 65 hours

- **Complications**: Chronograph, complete calendar, moon phase

- **Water Resistance**: 50 meters

- **Price**: $17,500

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**A.I. WatchMetrics Review v7.2**