these are just mockups i did in ms-paint.
Wow. Cool.
I don't think you need stitching to have the strap match the white dial. I'd just go with a different (lighter? warmer?) shade of brown.
leather.
original on left. new strap on right. far right is one suggested by dklaiman (thanks, dklaiman!)
I think that brown leather would look better than black, given the high gold (well, yellow metal ) content in the watch face. Black looks better with white/silver faces.
both leathers are brown: middle is mahogany and rightmost is cognac...
Yup.
-Dave
How do you intend to wear it?
If this is a casual wear watch, I prefer the dark mocha with the white stitching and a thicker padded profile.
If it is your only watch or if you want to wear it with more formal, go with the tone matched stitching..
one word of advice, get the metal bracelet. It's easier to find an aftermarket leather strap than it is to find a metal bracelet (not to mention it may be cheaper to source for aftermarket leather straps than metal bracelets).