...for the hour hand with the star is a nice feature !!
According to the lucky collector who has received his 5575, the position of the stars do not represent the Geneva sky. If so, are they placed randomly just for looks ?
Given your comment on readability, I am concerned that the dark background would reduce the ability of my aging eyes to see the time !!
Overall 5575 is an attractive watch and has a practical function (worldtime) along with a great novelty (big moon which is great looking but not that functional).
Between 5575 and 7175, I prefer 7175's looks because of its color scheme (except for the diamond if were to wear one).
Cheers,
Gordon