Thanks Ron for the reply. I think we are talking about the same material. The material is cloth. I just used the word "tweed" to help describe the pattern which is like a fine houndstooth design. Let me further explain. The same material is in my 1982 240DL. The OEM Color and Upholstery Guide describes it as "Grey/Black Cloth". The code for my car is #2320. The same car is for show only and has won many awards including "Best of Class" at Concours d'Elegance judging events. Unfortunately, the drivers seat is starting to show some wear. I have been looking EVERYWHERE for either a replacement seat (which would have to be in mint condition) or replacement material. Searching for over a year has come up with nothing, and trust me, I have many Volvo connections and the material is simply not available anymore. However! I have discovered the same material was used in 1990, as I have personally seen it in later 240 models. If I had the code for the later models, I may have a second chance finding NOS stock. Same material, just a different code. Volvo was famous for doing this over the years. If I can get a new reference code to work with, I just may be able to find the material before it's too late.