Mark in Paris[Purist]
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A new orange colour decision for the RM50-03 Split-Second Tourbillon Chronographe McLaren F1
Following the presentation during the SIHH 2017 of the new RM50-03 prototype made in collaboration with McLaren F1, the brand has fixed the definitive choice color for the reference. You'll see they changed the red accents to orange on the strap, crown and flange.

I liked it all red but it seems that the McLaren F1 car will be orange for the 2017 season, thus this evolution.
Here are other pictures of the definitive layout:
Best, Mark