I'm interested in any idea who made the pickups that are presently in the guitar. I'm not a Mosrite expert by any stretch of the imagination, but I've owned 5 vintage Mosrites over the years and these pickups definitely have THE sound. They are very well constructed.
They have no markings, but don't appear to be new. The use of epoxy for the back is like the old Mosrite pickups. The Novak pickups and the M-3 California pickups use epoxy backing and unmarked covers just like the ones in this guitar, but those makers usually have some kind of label on the back of the pickup.These do not.
To my eye, the screws in the surrounds look less bright than the screws in the pickup. The epoxy and back of the pickup look aged to me.
Any theories as to the maker? Sarah mentioned that she thought they look original, albeit with different covers-- but that she would defer to the pickup experts.

