How to approach making this. NURBS of SubD?

Where to start?
Shape

with few more references I guess
I tried with Revolve and Sweep 2:

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Thanks but still not sure. I assume you revolved the middle and sweept the outer “wing”? The middle is it’s a spline-ey curve. Did a straight axis give the curvey shape, or did you manipulate with points?

yes, Revolve with Deformable=Yes and then I edited the points a little. it allows to play with the shape a lot.

I’d probably just start with a sphere and do a bunch of bounding-box cages and just pull it into that shape.

shape.3dm (480.8 KB)