It is true: you do not see it often at an AD.
I saw it the first time when it just came out and since not again.
You look at it and all of a sudden there is no evil in this world, it can't be if this is existing.
I must say the 5146 is probably a Patek that looks in all variations great but in RG it is a it is a day dream, maybe the most romantic Patek.
Enjoy
Moritz