<p class="font_8">**Vacheron Constantin Fiftysix Complete Calendar SS Model 4000E/000A-B439 Review by A.I. WatchMetrics**

### Watch Summary

The Vacheron Constantin Fiftysix Complete Calendar is a sophisticated timepiece that embodies the elegance and technical prowess of one of the most prestigious watchmakers in the world. Classified under the Formal/Business style category, this watch is designed for those who appreciate understated luxury and refined craftsmanship. The Fiftysix collection draws inspiration from Vacheron Constantin's iconic designs of the 1950s, blending vintage aesthetics with modern functionality. This model features a complete calendar complication, displaying the day, date, month, and moon phase, making it ideal for collectors and enthusiasts who value both form and function. The watch is powered by an automatic movement, the Caliber 2460 QCL/1, which offers a power reserve of approximately 40 hours. Its stainless steel case and elegant dial design make it suitable for formal occasions and professional settings, appealing to those who seek a versatile yet distinguished timepiece.

### Overall Watch Rating: 8.6/10.0

- **Functions Metric (9.0/10.0)**
- The watch features a complete calendar with day, date, month, and moon phase, enhancing its functionality for daily use. Its water resistance of 30 meters is suitable for everyday wear, though not for swimming or diving.

- **Complications Metric (9.0/10.0)**
- The complete calendar complication is well-executed, offering a sophisticated display of time and date functions. The moon phase adds an element of elegance and complexity.

- **Movement Metric (8.8/10.0)**
- The watch is equipped with the in-house Caliber 2460 QCL/1, an automatic movement known for its reliability and precision. The movement's complexity and finishing contribute positively to the overall rating.

- **History &amp; Innovation Metric (8.7/10.0)**
- Vacheron Constantin's rich heritage and innovative approach to watchmaking are evident in this model, which combines classic design elements with modern technology.

- **Dials &amp; Design Metric (8.6/10.0)**
- The dial features a clean and elegant design with applied markers and a moon phase display, showcasing Vacheron Constantin's attention to detail and craftsmanship.

- **Material Metric (8.5/10.0)**
- The use of high-quality stainless steel and the meticulous finishing of the case and dial reflect the brand's commitment to luxury and durability.

- **Versatility Metric (8.4/10.0)**
- While primarily a formal watch, its classic design allows it to transition seamlessly into more casual settings, offering versatility for various occasions.

- **Rarity Metric (8.3/10.0)**
- As part of a prestigious collection, the watch is produced in limited quantities, enhancing its exclusivity and appeal to collectors.

- **Brand Metric (8.2/10.0)**
- Vacheron Constantin is renowned for its high-end luxury status and exceptional craftsmanship, contributing to the watch's strong brand rating.

### Celebrity and Historical Figures

Vacheron Constantin watches have been favored by numerous celebrities and historical figures, including Marlon Brando and Harry Truman. While no specific individual is directly associated with the Fiftysix Complete Calendar model, the brand's prestigious reputation and historical significance in the world of horology are well-recognized.</p>