The grained finish on the bezel face picks up the grained finish of the dial. I'd say that is deliberate and they are intended to match; without giving it much thought, then, I'd say it was a genuine part intended for that watch but I'd happily defer to someone who's looked into it more. At the time Heuer was going through a couple of ownership changes, so there are a number of things that don't appear in documentation like catalogues.