C17th English Rapier Blades

[Triarii]

Here are a few.
First one from the thread in the other forum where these blades are mentioned. Second from a dealers page, third is mine. There is another out there in the auction world which is the same shape, on a transitional rapier, though the back edge slopes slightly to one side.

All have a single edged, very deep isosceles section triangular blade.