Brand: IWCModel: link Ingenieur Perpetual Calendar link Digital Date-MonthReference Number: IW381802 Diameter: 45mmThickness: 17.4mmCase Material: Grade 5 titaniumDial Color: GreyIndexes: link Applied batonsLume: Yes, on hands and hour markersWater Resistance: 120 metersStrap/Bracelet: Black calfskin strap