Richard Mille water resistance: RM005 different than RM010

[trfChris]

Hi all, I’ve been researching Richard Mille and I’m a bit confused about the water resistance ratings. I much prefer a 100M rating to be able to swim in a pool without worries etc, but pretty much all the tonneau case RMs now have 50M ratings.

The RM005 is the only tonneau with a 100M rating but the RM010 has a 50M rating. Anyone know why they are different? I thought the only difference between them was that the 010 has a bit more skeletonization of the movement than the 005. I wonder why they felt the need to lower the WR because of this.

I’m a bit surprised why they can’t put in some more o-rings to bump up the WR rating in a ~$100k sports watch. For instance Hublot was able to make a tonneau-cased watch with a 100M rating (Spirit of Big Bang) so it seems doable.