Each pot seems to be slightly different. I'm guessing the 500k pot is the volume? The other two are 1 meg.
Did you buy these or are they pre installed on a guitar or what?

The pots should have their value printed on them somewhere.

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You have two one meg pots, and one 500k? Not good, a one meg tone pot would be seriously dark, you wont like that at all.

I prefer one meg volume pots, and 250k tone pots. Can you not get two of the 500k pots, and send one of the one meg back?