Thanks to apexxn for posting the photos for me.

So, I've done some more reasearch and it seems that the plate was added from new but not by Honda.

I have been speakinfg to an old Japanese guy who used to own a Honda shop in Japan in the 80's and 90's and sold MC22, NC30/35, MC18/21/28 from new (how cool is that!) and he said one shop (that he can't remember the name of) added the plates and sold them with an HRC Repsol Jacket and some hrc stickers etc etc in an effort to exaggerate the exclusivity of the bikes.

The other dealers thought that they were dicks.......haha!

Anywho, the rear fender decal is real and I am going to protect it with clear plastic.

I am still going to enjoy the Repsol plate and the oooohs and aaaahs it gets from those that don't know that it is a fake!