Well from what i've been reading... apparently some of the GW and DR casebacks originally came with black paint in the lettering. This would have later been removed during the first polishing at a RSC. I saw some examples of never serviced GW's that have black paint in the lettering. Someone asked about why it was there and James Dowling said they orig came with black paint but if its ever been serviced by Rolex, then its been removed. Now guys are putting the paint back in....
i just thought it was interesting. I always thought it came unpainted from the Rolex factory. I've been reading the Timezone rolex vintage forum more and more lately and there is some excellent info in there for us vintage rollie guys!!!
cheers
dizz