Aguilar j pickups: are these 60s or 70s?

[abotaun]

I came into a set of Aguilar 4 string j pickups, but does anyone know how to tell if they are 60s or 70s versions? I know they would sound different, but without being able to install them and compare, any markings that would be different? I couldn't find impedance listed anywhere, does anyone know that? Any help would be greatly appreciated. I will likely sell the set, so I want to make sure people know what they would be buying.
Thanks!

 

[Bufalo]

This is purely in rules of thumb, but usually formvar wiring (used in the 4J-60) is a brighter copper color, while plain enamel (used on the 4J-70) is more red or purple - darker. Pop 'em out of the covers (can you do that?) and see what the windings look like?

 

[abotaun]

This is purely in rules of thumb, but usually formvar wiring (used in the 4J-60) is a brighter copper color, while plain enamel (used on the 4J-70) is more red or purple - darker. Pop 'em out of the covers (can you do that?) and see what the windings look like?

Thank you for your reply. Sorry that I did not see it til now. It is definitely a more red dark purple color. Thanks, I really could not tell otherwise!