Identifing Pickups

[kikkoet2]

Hello again-

I have some spare parts laying around, so I'm going to assemble a strat. I have several sets of single coil pickups but it's been so long since I purchased them, (either as part of a pickguard or on thier own) that I don't know if they came from a Squire or a Standard Strat or if they're not even a Fender brand!
Is there some way to tell the quality of the pickups without installing them? I have the tools to test them if I knew what to look for.
Any suggestions?
Thanks guys,
Kikkoet2

[ranchtooth]

if they're unmarked, I'd say you are pretty much out of luck and doomed to trying out which ones sound best.