audioguy58 I have on occasion seen plates that begin with KHG-, the German-language abbreviation for keuschheitsguertel.
I have also seen KTB- plates. KTB is the abbreviation for Kali’s Teeth Bracelet, a rather severe male chastity device.
Funny!
In France,it is 2 letters,3 numbers,then 2 letters.Never thought about it if I noticed CB(chastity belt),or CC("ceinture de chasteté").