413-Ebay rtcwx Lithuania sample number license plate
In November 2015 Ebay seller rtcwx from Bremerhaven in Germany was trying to sell this, unused sample plate. It is from the 1992 series and the G should indicate the county code. There is no county code G, there were no vanity plates in that series and KGB would be a banned registration anyway.
It is either a manufacturer's sample with a wrong or impossible registration or a fantasy plate made as a joke of some sort.
Be very careful what you buy and check before bidding that the plate is real.