Refinement and elegance are the bywords for this Master Ultra Thin Calendar watch. The watch displays the traditional hour, minute and small seconds hands, a date hand indication and windows for the day, month and moon phase indications, all presented in an understated, timeless design. This model preserves all the philosophy and DNA of the Master Ultra Thin line. The watch is enclosed in a 39mm-diameter case. The 891/2-448 self-winding movement and its traditional finishes can be viewed and admired through the sapphire case-back.