1942-43 New Jersey Licence plate and a PA Tag

I was just antique shopping with my aunt. And I had found a license plate on the wall and was telling the woman who worked there that I collected license plates. Well she pulled out this one. Its a 1942 New Jersey plate, with the 1943 add on tag. Well I absolutly had to have it!!! And then I went to another store and found a Pennsylvania 1943 tag.