Yeah, you may be right. The handlebar on mine --of the same vintage, within a month-- doesn't have the long straight section at the top, but that doesn't necessarily mean anything. I can't prove mine is original, I can't prove the other one isn't; maybe they both are, maybe they both aren't. At any rate, here's mine:
I was comparing it to the one in the brochure right below the bike. At that age who knows what is really original and what might have been added at the dealer. I have bought more than one new bike and promptly swapped out components to serve my needs.
Aaron