Here's a photo of another pickup that I found that has a bobbin exactly like mine. Notice how sharp the edges of the gray bobbin are:
The pickup in this listing below (somehow) sold for $895.
Every other Fender pickup I've found from this era has a rougher appearance around the edge of the bobbin - I think this is going to be the 'make it or break it' characteristic for this pickup. Whether that is original or not is currently about a $1000 question for me.
That seller claims that the pickup was removed from an original 1966 Stratocaster - so IF that this is true, then that helps to authenticate that my pickup bobbins are real indeed Fenders.
If that's a fake 'vintage pickup', someone got seriously ripped-off, and this (well-known) seller should be ashamed for claiming that they removed it from an all original Strat