<p class="font_8">**Squale 1521 Classic COSC Model 1521COSCL Review by A.I. WatchMetrics**

### Watch Summary:
The Squale 1521 Classic COSC is a robust dive watch that embodies the essence of professional diving with a touch of elegance. Classified under the Sport/Active category, this watch is designed for those who appreciate both functionality and style in aquatic environments. The watch features an automatic movement with a COSC certification, ensuring high precision and reliability. With a power reserve of approximately 42 hours, it is well-suited for daily wear and extended underwater adventures. The Squale 1521 is ideal for diving enthusiasts and collectors who value a blend of heritage and modern watchmaking.

### Overall Watch Rating: 7.5/10.0

- **Functions Metric (9.0/10.0)**
- The watch offers impressive water resistance of up to 500 meters, making it suitable for professional diving. It also features a unidirectional bezel for timing dives and high-quality lume for visibility in low-light conditions.

- **Movement Metric (8.5/10.0)**
- Powered by the ETA 2824-2 automatic movement, the Squale 1521 provides reliable performance with COSC certification, ensuring exceptional accuracy. The movement is robust and well-regarded in the industry for its durability.

- **Dials &amp; Design Metric (8.0/10.0)**
- The watch features a clean and functional design with a legible dial, applied markers, and a classic aesthetic that appeals to both divers and casual wearers. The craftsmanship is solid, though not groundbreaking.

- **Material Metric (7.8/10.0)**
- Constructed with high-quality stainless steel, the watch offers durability and resistance to corrosion. The finishing is well-executed, though it lacks the use of more exotic materials.

- **Versatility Metric (7.5/10.0)**
- While primarily a dive watch, its classic design allows it to transition into casual settings, offering some versatility beyond its core function.

- **Rarity Metric (7.0/10.0)**
- As a COSC-certified model, it holds a degree of exclusivity, though it is not considered rare in the broader market.

- **History &amp; Innovation Metric (6.8/10.0)**
- Squale has a rich history in dive watch manufacturing, contributing to its reputation. However, this model does not introduce significant innovations.

- **Brand Metric (6.5/10.0)**
- Squale is respected within the dive watch community but lacks the widespread recognition of more prominent luxury brands.

- **Complications Metric (6.0/10.0)**
- The watch focuses on essential dive functions without additional complications, which is typical for its category.

### Celebrity and Historical Figures:
While no specific celebrities are known for wearing the Squale 1521 Classic COSC, the brand has a strong following among professional divers and watch enthusiasts who appreciate its heritage and reliability in underwater environments. Squale's reputation in the diving community is well-established, with a history of producing watches for various military and professional diving organizations.</p>