This visually dramatic watch would appear to be unique amongst the reference 1463 in having a dial with neither indexes nor numerals and also without a timing scale of any description. The dial would certainly seem to be a finished piece of Patek Philippe manufacture and indeed the layout of the outer minute/seconds track would preclude it being an unfinished piece as there is no space remaining for any kind of timing scale. There are several variations of dial for the reference 1463 including dials with tachometer, pulsometer and asthmometer so within the reference many variations exist and therefore the present dial could be an un-adopted design or trial piece for a model that never came into being. The explanation for the existence of this watch can only be conjecture but its striking appearance certainly has great appeal. As these test or prototype dials are never entered into the archives, an extract from the archives will not be available.