These were sold by Robinsons Country Leisure uk. They are not in production anymore. However these pop up second-hand and they are a good starter saddle for anyone thinking about trying one.
They have closed stirrup rings, so should be used with a safety stirrup or safety fitting on the leather.
The pad designed to be used with this saddle had the option of movable knee rolls. These could be positioned in three different places. If you come across a pad with missing blocks you can easily replace these as some treed saddles have velcro blocks on the saddle itself. It also has shock absorbing inserts.
Feel wise they are similar to riding in a Torsion. But have the look of Barefoot.