Hey peoples - my thanks to you, and I am sorry I wasn't clearer in my question.
I know the staggered pole-piece in the picture is:
Original CBS-era Fender/Seth Lover "Wide Range Humbucker" pickup
That's the SPECIFIC name. It was the GENERIC name I was after, the name that is given to that style of pup by all manufactuers (like 'single-coil', 'humbucker', 'bar', 'piezo' etc. rather than P-90, PAF, Charlie Christian, etc).
[Are these what Lindy Fralin calls "Split-Single-Coils"?]
General concensus is they are bassier than a straight 'bucker, which is useful info..... though users in the wild also suggest brightness too, confusing.
Does anybody else make a similar item now.
Only ones I can find seem to be the GFS "Vintage Split" humbucker - which are strangely low cost - and seem NOT to be CuNiFe.
I ask because I was wondering who else (OTHER than Fender / Seth Lover) was turning them out in the seventies. Got my eye on a pair - come in a metal mounting-ring with three (yup - 3) screw mounts instead of the usual four-screw. Doesn't seem to be much discussion out on the interweb-thingy about them - so I am thinking they just look good but don't sound too wonderful (presumably why they are not so popular.....)