B3646 Sandos-DuMont 2025 – The latest color variant of the model. Both gold and full-gold options are available (custom watch bands in quartz or mechanical style are also available for customers to choose from). F1 is the most advanced version released b

1. Case: The case is manufactured using high-quality CNC processing techniques from German factories; the fit between the case and the watch movement is extremely accurate, ensuring that most components can be replaced with those from genuine watches. 2. Movement: The inner case uses a solid cover identical to that of the original watch; the movement is carefully positioned and secured through CNC processing. The craftsmanship is exquisite. In contrast, ordinary watches use very low-quality plastic covers, making them feel light in hand. 3. Movement: It features a high-performance Swiss quartz movement plus a specialized Calatrava clamping mechanism. The movement operates accurately with no need for repairs. 4. Dial: The dial is crafted using CNC technology; it has a three-level silver coating and elongated Roman numerals. The pattern resembling sunlight rays gives a beautiful and clear appearance. 5. Sapphire Glass: The glass is made of French sapphire crystal with high transmittance, giving a subtle, almost invisible appearance. 6. Leather Strap & Clasp: The strap uses Italian calfskin leather, with a crocodile-patterned texture. The surface is polished with agate stones, offering a quality and feel comparable to ordinary crocodile leather. The clasp is identical to those used in the original 1/1 models, enhancing the overall appearance. 7. Hands: The hands are made of steel that has been heat-treated, allowing for a gradual rotation effect, making them very dynamic. 8. Crown: The distinctive crown features circular beads created using a five-axis CNC machine. These beads are polished carefully, resulting in a smooth and well-defined shape. At the top of the crown, there is a blue stone polished from natural ore; ordinary models use glue or synthetic materials, resulting in a dull color, while this model shows a beautiful luster under light. 9. Finish: The case body has a polished finish on its front side, with smooth and clear scratches. The edges of the case and sides are also polished, giving a clear and distinct appearance. The band is treated to resemble a mirror surface, and the exposed screws add to the premium feel. 10. Packaging: The label, warranty card, and code on the bottom cover are all consistent. This watch can be worn with formal business attire or sportswear. Calatrava’s reputation and timeless design make it an excellent choice for personal use or as a gift to friends and family!! 3D