Yep, Hi-E. They have the same lowered-foot advantage as the Shimano
Dyna-drive, but earlier.
Hi-E didn't have that idea first though, the French "SansAxe" had it,
late 50s maybe? And probably, someone else did it in the 1890s if this
is according to pattern.
> That's an old Weyless seatpost, right?