The only marking in the back are the manufacturing date, how much kilogrammes they can handle( VIA 690kg) I think, ET number, what size they are (18x7.5JJ) and some kind of number 168-1875. There’s also some H and embedded writings like H27 101. On the Zito badge cap there are manufacturing markings and they’re of by 3 years. K64 CAP and ZY are embedded on the cap.