Does anyone know the origin of the vehicle emission control sticker that was placed on the top right underside of the hood on 240z?  Was it installed by the dealer?  I am trying to determine which year sticker I should install on my car.

I have one of those odd cars that is titled as a '71 but has a build date of 6/70.    

In my case, the sticker on the car was silver but the printing wore off.  So I don't know what year was printed on it.  In the case of the green car below, it was also titled as a '71 with a build date of 5/70 but I really don't want to assume based on one car.

Did the dealer install these?  

Thanks
Gary

 

Given the consistent placement, I would assume it was put on at the factory before the cars were loaded on a ship