[LAYERS of TIME] In 1924, we created our first product, a pocket watch. The theme of the cross-sectional project that will appear in this milestone year, 100 years since then, is LAYERS of TIME . Using Fujifilm Corporation's structural color ink, the dial is decorated with a design reminiscent of the beautiful interior scenes created by the Earth over time, such as geological formations and minerals. [PROMASTER, a full-fledged sports watch that can withstand harsh environments] A subtle black gradation is added to the back of the dial using inkjet technology, creating a rich expression. The unified white hands and indexes serve as accents that highlight the brilliance of the structural color and add a refreshing impression. The back cover is engraved with a distinctive map layout, making this a watch that allows you to experience the sky and the earth at the same time. [Citizen's radio-controlled clock that keeps accurate time at all times] Equipped with Citizen's proprietary light-powered Eco Drive technology that eliminates the need for regular battery replacement. A world time radio clock that synchronizes to accurate time no matter where you are. It is packed with radio-controlled clock technology that Citizen has been challenging for 30 years. [Details for long-term use] The sapphire glass is scratch resistant and highly transparent, and has an anti-reflective coating that prevents light from reflecting on the glass surface. Water resistant to 20 ATM. Convenient date and luminous (hands + index). [Product Details] Photovoltaic Eco Drive radio clock, ±15 seconds/month (when not receiving data), Photovoltaic generation: Approximately 2.5 years, Sapphire glass (non-reflective coating), Case/Band: Stainless steel, Water resistant to 20 ATM, Magnetic resistance 1 Seeds, luminous (hands + indexes), aeronautical slide rule, screw lock crown, structural color ink, dial parts: recycled materials, limited to 10,000 pieces worldwide