I put a couple of pics up. See what you can determine from them if you want to see something more specific let me know.

You can see the screw head bulging under the leather in one shot.

It appears there is a rigid piece of something in front which has the main fur afixed to. Then the gusset part is stitched to that inside out then folded over into positionand stitched to the back with the trim leather to cover the seam. Then a Finish panel is added to the front inside to cover the seams there and the cantel added and screwed in place. Then a very thin strip of leather to cover the screw heads.

Really is a very basic rig and should be very easy to duplicate.