How to check CS60 pickups authencity

[alencarlc]

Hello brothers!!
Im about to buy a pair of custom shop 60' bass pickups, and from what i've seen, there is no fender logo or something on the pickups, only the fender box, can you guys enlight me about how to check if it is a authentic fender custom shop 60'?

Thank you!!

 

[El Güero]

I had CS JB neck pickup. It had a CS logo sticker that resembled a flattened V on the cover. Don't know if they are all like that.