The Vostok Europe Lunokhod 2 Multi-function Watch on Bracelet YM86-620C635B stands as a testament to exceptional craftsmanship and advanced watchmaking, inspired by the storied Lunokhod-2 moon rover. This exquisite timepiece is meticulously handcrafted in Lithuania, embodying both a homage to space exploration and the pinnacle of horological innovation.

At the heart of its robust design lies a 49mm casing, constructed from 316L stainless steel, renowned for its durability and resistance to corrosion. The casing is further enhanced with a high-grade PVD (Physical Vapor Deposition) plating, offering an additional layer of protection against wear and tear, while imbuing the watch with a sophisticated finish. The substantial 17.5mm thickness of the watch asserts its presence on the wrist, making it a bold statement piece.

The Vostok Europe Lunokhod 2 is equipped with a screw-down crown and a unidirectional rotating bezel, features that not only enhance its aesthetic appeal but also its functionality, particularly for diving enthusiasts. The bezel allows for the tracking of elapsed time underwater, an essential feature for any professional dive watch.

One of the standout features of this timepiece is its 3.5mm thick K1 crystal. K1 crystal is a type of mineral glass that offers the perfect balance between the scratch resistance found in sapphire and the impact resistance of traditional mineral glass. This makes the K1 crystal exceptionally durable and suitable for the adventurous wearer, ensuring clarity and protection of the dial under all conditions.

Illumination is a key aspect of the Lunokhod 2, achieved through the innovative use of stand-up tritium tubes mounted in a patented "candle holder" arrangement. This design not only improves the watch's luminosity in low-light conditions but also adds a unique aesthetic touch. Tritium tubes glow continuously for decades without the need for exposure to light, providing unparalleled legibility.

The watch boasts a water resistance of up to 300 meters, a remarkable feature that underscores its capabilities as a professional dive watch. This is complemented by a custom stainless steel bracelet, alongside additional leather and silicon straps, allowing for versatility and personalization in wear. The inclusion of a professional dive box, a tool-changing tool, a manual, and a warranty card, encapsulates a full package for the discerning collector or enthusiast.

A highlight of the Vostok Europe Lunokhod 2 is its Seiko YM86 multi-function movement, which powers a 24-hour chronograph and a perpetual calendar. The perpetual calendar mechanism is a marvel of horological engineering, automatically adjusting for months of varying lengths and leap years, ensuring that the wearer never needs to manually adjust the date. This convenience, combined with a 5-year battery life, emphasizes the watch's reliability and low maintenance.

Further enhancing its functionality, the watch features a sound alarm, a black dial with white subdials for increased contrast and readability, and a helium release valve, a crucial element for deep-sea diving where helium saturation can occur.

Each Vostok Europe Lunokhod 2 watch is a part of a numbered limited edition of only 3000 pieces, making it not just a tool, but a collectible item. With a full 2-year warranty, owners can be assured of its quality and durability.

In sum, the Vostok Europe Lunokhod 2 Multi-function Watch YM86-620C635B is a masterpiece of watchmaking, combining rugged functionality with sophisticated design. It is an ideal companion for the adventurous, the collectors, and those who appreciate the fusion of technology and artistry in timekeeping.