One question though..
Do you all really think that the BO Members will put some serious efforts to get their vehicles registered.As you all think that these are their real License Plate Numbers..
I don't think that this is a silly typo error..Comeon!..U have to seriously put on some efforts to draw(P.S they are not typing it,they are drawing it..so its not a typo error that's for sure)
I personally feel that Gosho-sama is scattering these kinds of hint in every major cases,that will come forward in the begining of the end arcs..
Gosho-sama is not that fool enough to let this silly mistake to pass just right under his nose..He is a mystery mangaka,and he is into this field right from the time when most of us were not even able to understand what does DC is..
So whatever the case is ,its not a mistake ,it has some hidden connections with future arcs, that's what i think..
and Gin has all right to change the license number of his car as that hardly matters to him or the Licensing Dept. ..maybe he was on different mood that day. Who knows hehe
Be patient and live with the knowledge that, all you are searching for, is certain to come if you prepare for it and expect it.