REF.1160AD is a square clock unique among other. The movement is equipped with Cal.8541B. In the pellaton winding method of IWC in fast-forward the calendar is not included. Dial that is exciting to fit the shape of the case in the original. This individual is also the sharp edges of the case left, is very attractive. Square is a model precisely because you want to adhering to the edge of the case. Buckle has been replaced in the current.