Hi, Andy. Welcome.
If the pickups have two screws on either side, they are Schallers. If they have two screws and the switch knob has a dot on it, they are likely HRW's. Most others will likely be a type of Duncan pickup. Usually 59's and Seth Lovers are stock from the factory. You will have to look on the bottom of the pickup to see what the sticker says. Or, you can unscrew the control cavity cover and look at the sticker on the back of it. That sometimes tells you what kind of pickups are in it.
Pictures would help us try to figure it out.