start with a tube, height=width of band. Turn on slice, make it half a tube.
Set pivot to center, and shift-rotate to make 2nd band. move it down a little.
Now, what I SHOULD have done is make the half sphere before I non-uniform scaled the two together, but I didn\'t.
That\'s why the sphere part doesn\'t match up perfectly, but who cares...
Make another tube for the main band, do some face extruding/tapering...attach the other two bands...add a subdivision mod, force quads...
make some rivets...half spheres or gengons... I usually add a noise mod to break up the perfection...
All the shaders are darktree shaders.. f\'n awesome.
http://www.darksim.com -it be free.