Interestingly, the actual date of the launch was - of course - the 24th, but Herr Blümlein wanted the dates set at the 25th such that they would be correct in the photos in the following day's newspapers. Yet another mark of the late man's genius.
Its all about the angle and lighting. These dials are simply wonderful (and if I recall correctly an absolute pain to make!). Some older pics showing the playfulness of the dial: