Hi guys, I recently bought this strat from 1979. I believe the pickups are not original, but somewhere in time got replaced. Or is it even possible they are original? The seller couldn't give me more info. The bobbins say 016730, wich are used on several fender PU's. There's another number on the neck pickup but can't read it clearly. I believe it says either 20901, 20981, 20981 or 20987 (see picture). Could you guys guess what they are? Thanks!