Hi Piet and thanks for your email. My car is a 4l from 1972, 783cc engine, no opening back windows, back bench does not fold, But it does have a heater. A basic car, I think called a 'commercial' model. Most of the seat cover is there in a grey 'corduroy' type fabric which is very nice. Has a couple of Gitannes holes, but otherwise good. Its the under webbing that has failed. The rubber panels that are stitched into the fabric support structure have de natured and are cracked or split, and have given way so dont support and I cant sit in the car properly. I have found some lounger replacement fabric panels complete with eyelets down the sides, which I am hoping to use as a springy support and then maybe just have the fabric seating on top of them. If you have any suggestions re the seating repair I would love to hear. No one has responded to my post so I dont think any one here has the hammock type seat any more, they being replaced by the later upholstery.