Some JB pickups use one piece plastic bobbins. You'll have to remove it and look at the bottom. If there are square holes between the magnets, they are (might be) one piece bobbins with the magnets encased in the plastic, so it's safe to move them since they don't come in direct contact with the coil wire.
I believe there'll be a fairly long number on the bottom, made that way (not written).
Some Fender Strat Am Std are similar, if you're familiar with those.