Restoring the Heart of the Bulgari Diagono Sport LCV35S

A deep dive into our 50-point inspection and full overhaul process of the LCV35S. See the +1s/d precision results from our 2026 service.

At RYBrandshop, we believe that a luxury watch is more than just a piece of jewelry—it is a living mechanical organism. When this Bulgari Diagono Sport LCV35S arrived at our workshop, it was a beautiful icon in need of a new lease on life. Today, we invite you behind the bench to see how we transformed this pre-owned timepiece into a work of mechanical art through our rigorous 2026 restoration process.

The 50-Point Inspection: Finding the Pulse

Every watch that enters our "Workshop" category undergoes a mandatory 50-point diagnostic. For this Diagono Sport, we focused on the Caliber 220 (ETA-based) automatic movement. While the watch was aesthetically "Grade AB," the internal lubricants had begun to dry, and the amplitude was sub-optimal. Our goal wasn't just to make it "run"—it was to bring it back to factory specifications.

Our watchmakers carefully disassembled the movement, inspecting every gear for wear. To ensure long-term reliability, we performed a full overhaul (OH) on March 31, 2026. This process is the difference between a simple "used watch" and a RYBrandshop certified timepiece. We don't cut corners; we restore heritage.

Precision Engineering: Replacing the Vitals

To achieve near-new performance, specific components are non-negotiable. During this service, we replaced the mainspring (ゼンマイ) and the reversing wheel (切替車) to ensure perfect power reserve and winding efficiency. Furthermore, we installed brand-new gaskets (パッキン) throughout the case to secure its water resistance.

The centerpiece of this restoration was the official crown replacement. We sourced a genuine Bvlgari part to maintain the watch's total authenticity. Following the assembly, the case underwent a professional ultrasonic cleaning and a delicate polish, removing years of surface wear while preserving the sharp, architectural lines that make the Diagono a sport-luxury legend. We then performed a multi-day waterproof pressure test to confirm its structural integrity.

The Result: A Masterpiece in Motion

The numbers on the timegrapher tell the real story. After our 2026 service, this Bulgari Diagono Sport achieved a remarkable amplitude of 299°, indicating a vigorous and healthy heart. The rate settled at a stable +8 seconds per day with a beat error of only 0.3ms. These results are indicative of a movement that has been tuned to perfection.

When you buy a serviced watch from RYBrandshop, you aren't just buying history—you are buying peace of mind. Every component, from the Night-Glow (Lume) functionality to the clasp engagement, has been vetted to meet our high standards. Authenticity Guaranteed. This LCV35S is no longer just a pre-owned watch; it is a mechanical masterpiece ready for its next conquest.