Hi!
Since we only have a few twin screw models. there are a couple of ways that you can narrow things down without using a meter:
Are both pickups the same height, or is the bridge taller than the neck and, if so, is the cover itself physically taller / deeper?
If you could take another picture from underneath, so that I can see how the cover sits against the baseplate, I can identify what magnet size they are running, which should give us the answer.