Tourbillon Gear Transmission Model: Experience the intricate mechanics of the Tourbillon with this stunning gear transmission model designed for enthusiasts and collectors alike. Eco-Friendly Material: Crafted from high-strength PLA, this model is made using eco-friendly 3D printing technology, ensuring a sustainable product without compromising on quality. Manual Operation: Enjoy the hands-on experience of manually winding the spring to set the gears in motion, promoting a deeper appreciation for horological craftsmanship. Ready to Use: Delivered fully assembled, this model requires no DIY setup, allowing you to delve straight into the fascinating world of gear transmission and tourbillon mechanics. service: we value our customers' shopping experience. if you have any questions, please feel free to contact us, and we will respond as soon as possible within 24 hours