please help me date these pickups

[knarleybass]

Hi,
I have had these in a drawer for years I just came across them, I believe they are Fender pickups, but I am unsure of the date, or era rather.

[SGD Lutherie]

They look like Fender pickups. The one with the darker wire is probably plain enamel. It could be from the 60's or early 70's. Not sure why the other one has SPN wire. Was it ever rewound? They look the same age otherwise.

[knarleybass]

I don't know if it was re wound, I have had them for over 20 years...