I did a few more wristshots of the watch on different straps.
The black alligator from ABP I was mentioning in the original post:
The dark chocolate alligator from l'Atelier Jean Rousseau that I had made a few years ago for my vintage Rolex Submariner. It's a 20mm / 16mm instead of 20mm / 18mm on the ABP, so the JLC buckle doesn't fit. Not too sure about the tapered look on a large rectangular warch like the Grande GMT.
For the heck of it, I tried a black buffalo I sometimes wear on my IWC Fliegerchronograph 3705. Not too bad, but might be a bit too thin for the Reverso.
Can't blame me for lack of trying...
Cheers,
Boris
PS: I realize I am wearing the same shirt as I did a month ago when I took the picture in the 1st post. I swear that a) I have more than 1 shirt and b) it has been pressed since then...