I believe the Norge/Signature filter came along sometime in 64 or so, with the advent of the perforated tub. I don't have any of these machines anymore, the washers were really too far gone - both spewing oil into the wash water and the Her Majesty had a serious motor/rusty baseplate issue so I junked them all. Those Norge dryers were notorious lint belchers (forced air blowing through the machine rather than pulled through like a vacuum) and even though they were huge, they were rather slow. John Lefever told me once that you always know when someone has a Norge dryer in the basement because everything in the room is flocked like a x-mas tree!