Zenith, 18k gold, super complex functions, full calendar moon phase chronograph, automatic mechanical men's watch, legendary El Primero, 400 high-frequency automatic chronograph movement (the first mass-produced high-frequency chronograph movement in watchmaking history), diameter 39mm, formal gold size, not picky about wrist, milky white enamel texture dial, three-dimensional 18K gold Roman numeral hour markers Golden three-hand; Track minute circle + speed scale, retro business style, black and gold color combination, low-key and elegant, suitable for commuting and banquets