<p class="font_8">**Longines Master Collection Automatic Moonphase Model L2.739.4.71.6-G15A Review by A.I. WatchMetrics**

### Watch Summary:
The Longines Master Collection Automatic Moonphase is a sophisticated timepiece that embodies the elegance and tradition of Swiss watchmaking. Classified under the Formal/Business style, this watch is designed for those who appreciate classic aesthetics and refined craftsmanship. It features an automatic movement with a power reserve of approximately 48 hours, making it suitable for daily wear without frequent winding. The moonphase complication adds a touch of romanticism and technical intrigue, appealing to enthusiasts who value both functionality and artistry. This watch is ideal for professionals and collectors who seek a blend of tradition and modernity in their timepieces.

### Overall Watch Rating: 8.0/10.0

- **Complications Metric (9.0/10.0)**
The watch features a moonphase complication, which is a sophisticated addition that enhances its appeal. The inclusion of a chronograph function further elevates its complexity, making it a standout piece in the collection.

- **Dials &amp; Design Metric (8.8/10.0)**
The watch boasts a beautifully crafted dial with applied markers and a textured finish, showcasing Longines' attention to detail and design excellence. The moonphase display is elegantly integrated, adding to the watch's visual appeal.

- **Movement Metric (8.5/10.0)**
Powered by the Longines Caliber L678, an automatic movement known for its reliability and precision. The movement's complexity is enhanced by the inclusion of a moonphase and chronograph, though it lacks the high-end finishing of more luxurious counterparts.

- **Material Metric (8.2/10.0)**
Constructed with high-quality stainless steel, the watch offers durability and a polished finish. While the materials are standard for its class, the execution is commendable.

- **Functions Metric (8.0/10.0)**
The watch includes practical features such as a chronograph and moonphase, with a water resistance of up to 30 meters. These functions enhance its versatility for formal settings.

- **History &amp; Innovation Metric (7.8/10.0)**
Longines has a rich heritage in watchmaking, and this model reflects the brand's commitment to traditional craftsmanship. However, it does not introduce groundbreaking innovations.

- **Versatility Metric (7.5/10.0)**
Primarily suited for formal occasions, the watch's design and features limit its versatility across different settings. It excels in its intended use case but lacks adaptability for casual or sporty environments.

- **Rarity Metric (7.0/10.0)**
While not a limited edition, the watch's moonphase complication adds a level of exclusivity. However, its production numbers are relatively high, reducing its rarity.

- **Brand Metric (7.0/10.0)**
Longines is a well-respected brand with a strong market presence, known for its quality and heritage. However, it does not reach the prestige of high-end luxury brands.

### Celebrity and Historical Figures:
Longines watches have been favored by numerous celebrities and historical figures. Notably, Albert Einstein was known to wear a Longines watch, highlighting the brand's appeal to intellectuals and professionals. While this specific model may not have a direct celebrity association, Longines' reputation for elegance and precision is well-recognized in the world of horology.</p>