G'day Jack , Gadge and all,

I had a quick look to see what early American patents I had showing blades,one patent mentions a reversible
type of sickle blade but if you look at the image of the blade with the red circle ,the angles of the cutting
edges are reversed for each side of the single blade which allows you to install the blade on the other end of the
cutter bar with the correct cutting angle.



Cheers
Max.

Attachments
A blade.jpg (128.77 KB, 71 downloads)
American slashers.jpg (83.4 KB, 70 downloads)
1 aa Blade.png (18.21 KB, 71 downloads)