What pickup is this?

[carldacorte]

I just picked up a 2001 Gibson Custom Shop Historic '61 LP/SG Std. It hasn't arrived yet (can't wait to get it!)

 

I got it for a steal which is why I wasn't too worried about the pickups... but I'm still curious if anyone knows what kind these are?

 

Gibson said they should be '57 Classics, but these don't have the standard PAF sticker like every other '57 I've seen... Just 57 written in red ink.

 

Any one have an idea of what they are or have seen them before? As far as I know, everything is stock.

 

Thanks!