My tech went over it and just shook his head and said yeah that's what it is ... Stuff like this is not that unusual from Fender.
I was courious so I had Mike my tech check the date codes ... here ya go
The neck carries a code that indicates it was made the 43rd week of 1974, November if I'm not mistaken.
Pot codes show they were made the 51st week of 1974 by CTS, Dec if my math is right.
Neck plate indicates 1975
So if the pots were actually made in Dec likely it was not assembled and shipped until after the 1st of the year or 1975 ... hence a 75 model.
Here is just one more example from an Ebay auction ...
Gibson was not exempt from this kind of thing either for that matter, it's pretty well known that in 1968 Gibson shipped several Les Pauls out with late 50s bodies on them.
Nothing is written in stone with these guys, my 68 P-bass is nitro laquer and all the books say it's not.
It's no big deal ... this stuff just is what it is, must have been the
FSR (Factory Special Run) of it's day!

... I don't have the only one like I said check G-base they are there too.