"C4" suspension code on my fender tag

My broadcast sheet was missing. All I have is the VIN and the fender tag. Car was built in LA Plant 9/13/67.
That's a different plant than mine, so that may explain the difference. We have two broadcast sheets, fender tag, original owner's manual with origina sale info. We bought it from the second owner so we just have word of mouth on when and how he bought it, but we have his original California registration.

Do you know if yours had the grille medallion originally?