Ok ... found it (eventually):
It's an EMG FT = active Tele neck pickup:
http://www.emgpickups.com/products/index/93/13/1
Their blurb is:
"The FT is undoubtedly the
best pickup we make. All the elements are in the right proportion; magnet choice, coil size, amount of turns, and good luck have given the FT the sweetest sound of any EMG."
I haven't bothered to check, but imagine they describe all their pickups as the "best".
?