Here's a photo of my original 3705 (with updated dial & crystal). It's one of my favorites, And I am just realizing IWC rearranged the subdials between these two.
They seem to respect fish crowns, because I never specifically asked to preserve them. That has been my experience with multiple services / multiple watches. However, I did once request to have tritium parts on a 3705 returned after updating dial and hand
This is one of my favorites. I've had it about 20 years since purchasing it from a listing on the PuristS, from a Purist. It's seen a lot of wrist and travel time, and I'm about as attached to this 3705 as I ever will be to a watch. It feels very personal