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This is a generic sapphire crystal designed for the Vacheron Constantin Overseas 7900V (and compatible with 4500V), measuring 33.0mm in diameter and 1.6mm in thickness.
Featuring a flat round profile, this aftermarket replacement crystal is made from synthetic sapphire (Mohs hardness 9), offering exceptional scratch resistance and optical clarity.
The original Overseas 7900V Dual Time features a 41mm stainless steel or rose gold case with 150m water resistance, and this crystal is designed to maintain the watch’s sporty elegance while providing robust dial protection .
About the Vacheron Constantin Overseas 7900V
| Specification | Details |
|---|---|
| Reference | 7900V (Dual Time), 4500V (Three-hand) |
| Case diameter | 41 mm |
| Case thickness | 12.7 mm (approx.) |
| Water resistance | 150m / 15 ATM |
| Crystal | Sapphire (original) |
| Movement | Caliber 5110 DT (7900V) |
| Power reserve | 60 hours |
| Features | Dual time zone (AM/PM indicator), date |
Important Note on Dimensions
The original Vacheron Constantin Overseas 7900V and 4500V have a 41mm case diameter . The 33.0mm measurement refers specifically to the crystal diameter, not the case size. The 1.6mm thickness is the crystal height/profile, which is typical for flat sapphire crystals used in sports watches with 150m water resistance.
Q1: What is the water resistance rating of the Overseas 7900V?
A: The Vacheron Constantin Overseas 7900V (and 4500V) has a water resistance rating of 150 meters (15 ATM) . This rating is suitable for swimming and snorkeling but not for high-impact water sports or deep diving. After any crystal replacement, water resistance must be professionally tested .
Q2: Can I install this crystal myself?
A: Not recommended. The Vacheron Constantin Overseas is a high-value luxury timepiece with 150m water resistance. Crystal replacement requires specialized tools (crystal press, case back opener), expertise in Vacheron Constantin case construction, and professional water resistance testing equipment. Improper installation can compromise the watch’s water resistance and value. Professional installation by a watchmaker experienced with Vacheron Constantin is strongly advised .
Q3: How often should my Vacheron Constantin be serviced?
A: Vacheron Constantin recommends servicing their watches every 3-5 years under normal wearing conditions . A complete service includes movement disassembly, cleaning, lubrication, replacement of worn parts and gaskets, and water resistance testing . Official Vacheron Constantin repairs are guaranteed for 2 years .
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