Pete....I can't believe you found this. I have a friend who has one and has been trying without success for a long time to find out what it is. (wire stock nr.1) I have tried the frame attached to see how it feels and it is very comfortable. It's actually made out of one piece of steel bent into this shape, quite ingenious in design, and very sturdy. Once again your research helps us all! Thanks!!!!
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Wilder Eber
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