The 5496P-015 is a self-winding platinum cased perpetual calendar with retrograde date display. The case measures a comfortable 39.5mm yet only 11.19mm in height ideal for fitting under a cuff. The silvery dial is vertically brushed and unusually for Patek has coloured gold hour markers and hands contrasting the silver. As with all platinum cased watches from Patek a diamond is hidden away in the case at the 6 o'clock position a subtle indication of the case material. The push pieces used to adjust the various functions are cleverly hidden between the lugs to keep the sides of the case as tidy as possible.