Genuine leather strap double-button butterfly buckle Longines-LONGlNES multi-function fully automatic mechanical movement, 12 digits for the month, 6 digits for the sun during the day, moon for the night, and 9 digits for the day of the week, containing the highest quality materials and meticulous attention to detail craftsmanship! Super mineral glass, vacuum electroplating, precision waterproof, diameter 40mm, thickness 12mm, high-end and classy, ​​the first choice for gentlemen,