It's kind of a long story but as a result of some work I did for a friend's father (that I assumed was pro bono) I'm being offered that choice of a Ulysse Nardin Marine Chronograph or an IWC Pilot Mark XVi. I don't have photos of the actual watches so I clipped the ones below from the net. The IWC actually has a white dial. Both watches are in the collection of the guy above and in as new condition. Personally, I'd prefer leather straps but I guess I can acquire those in the aftermarket. Any thoughts?