It was almost the same.Yes, I have a few (the middle one isn't a Respirator). Very nice watches.
The Respirator name seems to relate to the fact that their waterproofing uses the fact that water pressure increases with depth to push the crystal more firmly against a rubber seal and the case, thus (allegedly) increasing the water resistance. You can open the case simply by pushing the crystal with your thumbs and it and the movement pops out.
Dave


Hi.
I have some respirators here, but they are not so square
and I also have some squares but they are not water proof.