Mavic Ex 721 EX 721 | Mavic all of the above except the double eyelet.
their CD finished one came as standard on my 04 Koga-Miyata WTR.. it really is a cut no corners rim.

Over 20 years ago I used Mavic's Mod 4 in 700c , which was a wide tandem version of the MA 40/E2/Mod3..

under spoke nip tension, the inner ferrule squeezes the 2 walls together , and pushes the sidewall out, where every spoke is ,

making a slight BUMP, in the braking track which people dont like the looks of ,

so they stopped doing that , on rims, mostly .

I like that the 721 has that flat channel , which a stiff rim-strip-ring snaps into..

I re-laced my front wheel to add a Disc dynohub, and they are rigid and round.