Hi, i think it's down to individual taste, some like bigger diameter, some like me likes smaller especially when it comes to traditional chronograph watch like 5170. 5172 is also a very beautiful watch and it comes in slightly bigger case diameter.
For this piece would go anywhere, for any occasion. (nearly) Speechless (as there are so many fish in the sea). But really⦠for me the perfect balance. Most sincere congratulations. FH