Well THAT was an utter failure!!!!! :O

I just reviewed it an switched to front view. Oooops.

Here I reworked it to what I think is a ring, Though since I reworked the buggered up file I posted, I lost some mass around the lower portions. I believe this is the shape in the picture though....I suppose I may revisit this after a few beers tonight to see if I can get it right. (Seems I always miss some "very small insignificant" design detail like the "FINGER HOLE")

Ok, 1 beer and it looks a bit better!

Here's my approach.
The main surface is a network between the top ellipse and the four side profiles.
Then it's trimmed with the two side arcs to make the finger hole.
The edges are blended together using the 3 small arcs as profiles to ensure continuity. Notice that in order to draw these 3 arcs I used 3 pairs of lines perpendicular to the side edges and then I blended them with G2 continuity.

The file contains all the curves used as well as the final shape.
Cheers
Dan

Hi Daniele,

Good idea :)

Nice work Guys!
Very educational for all, love seeing the different approaches on this, we should do it more often.

Cheers

Cant let it go for some reason. Here's a shot at a different method I tried to think about. Legend included.