Casio The Japanese Factory Casio EDIFICE EFK 100YCD 1AJF Forged Carbon Automatic Wristwatch The Casio Edifice EFK 100YCD 1AJF Mechanical Automatic Watch Sapphire Men's Casio Edifice EFK 100YCD 1AJF Mechanical Automatic Watch Sapphire Men's CASIO EDIFICE EFK 100YCD 1AJF Forged Carbon Automatic Analog Men's. Discover the fusion of motorsport engineering and precision watchmaking with the Casio EDIFICE EFK 100YCD 1AJF Automatic Watch. Inspired by the world of high performance sports cars, this model features a forged carbon dial that evokes the texture and strength of carbon fiber used in luxury vehicles. Driven by a mechanical automatic movement (with manual winding capability), this timepiece delivers approximately 40 hours of power reserve and offers the emotional experience of viewing the intricate movement through the see through screw back. The dial features a simple yet sophisticated three hand design with date display, complemented by hollow hour and minute hands with luminous tips for enhanced legibility in low light. A smooth sweeping second hand and precisely finished mirror bar indexes elevate the watchs sporty and refined aesthetic. Key Specifications Feature Description Model Number EFK 100YCD 1AJF Series EDIFICE Automatic Module No. 5755 Movement Mechanical Automatic (with manual winding) Power Reserve Approx. 40 hours (fully wound) Accuracy 35 to +45 seconds day Jewels 24 Frequency 21,600 vibrations hour Water Resistance 10 bar (100 meters) Antimagnetic JIS Class 1 Functions Date display, stop seconds hand Case & Bezel Material Stainless steel Band Solid stainless steel bracelet with one push triple fold clasp Glass Sapphire crystal with inner anti reflective coating Back Cover See through screw back Dial Forged carbon style finish Size Chart (cm) Specification Size (cm) Case Size (H W D) 4. 35 3. 9 1. 25 Band Fit Size 15. 0 20. 5 Weight 14. 8 Size Chart (inch) Specification Size (inch) Case Size (H W D) 1. 71 1. 54 0. 49 Band Fit Size 5. 91 8. 07 Weight 5. 22