Cartier RONDE DE CARTIER London Series Mechanical Men's Watch 42mm 18K Nine Crowns Gold arrives with an 18k Nine Crowns Gold β American Crocodile leather strap, the case is made of 18k Nine Crowns Gold and is 5un thick. The London SOLO is a unique alternative to the Blue Balloon for men. Also featuring Cartier's highly recognisable Roman hour-markers, sword-shaped burnished steel blue hands and a deep blue spinel crown, the simple large three hands with calendar function are both adequate for everyday use and unobtrusive. A closer look at the seemingly modest exterior reveals details such as the bottom finish of the calendar, the capsule shape of the crown, the overall mirror and the curvature of the sides, all of which are unobtrusive details that contribute to the overall luxury and durability of the watch, and they just keep getting better and better. The case is 42mm in diameter and 8.6mm thick.Take away