The grommet looks an awful lot like what pooder has auctioned here,...
Most pictures of bass drum grommets I found on the web are "chrome like" looking.
I'll try to take a close up of the interior tomorrow.
In the mean time I'd love to see a picture of how a factory installed bass drum grommet looks like from the inside. I guess they don't go all the way through the shell otherwise they wouldn't let loose after a while. Why wasn't Gretsch doing it like most others and press the grommet back from the inside?
Anyway, even if the badge was removed at one point or not being all original, I wouldn't be bothered too much by it. With the damages it has, this one is not a museum piece and I'm already very happy with how super sweet this baby sounds!