Obsidian Black AutomaticSansi Mayo Automatic Mechanical Watch Dual Tone Edition (Black Dial) Understated Power. Mechanical Brilliance. With its bold black open heart dial and dual tone bracelet, the Sansi Mayo Automatic Watch is designed for those who appreciate subtle sophistication and timeless precision. Crafted with self winding mechanics and refined detailing, it's more than a watch it's a statement. Key Features: Automatic Self Winding Movement: Runs on your wrist's