Hi Mbg75, thanks for bringing notice of that sale to this board! Here's what I think - without any documentation from Carl or some other authority that was "in" on its build establishing true provenance, its probably not worth all that much. More than a decade of watching Big Rick on Pawn Stars explain this simple fact over and over and over again, makes me question the authenticity of such items.
Additionally that hacky-looking grafting of what appears to be part of a Penn chrome on brass reel foot to the Newell aluminum reel stand is suspiciously WAY below Carl's standards. I honestly doubt he would be showing off that kind of work in his business's office.
But I wouldn't be surprised if it does sell. There's A LOT of people out there that . . . well, anyway, to me it does resemble someone's backyard project. I suppose it COULD have been Carl, though that gear plate looks bogus and more Penn than Newell. Having owned (and still own) nine Newells of various generations and sizes including a "Blackie 220F" and a few P's, in addition to working on many, many more - well, this one just doesn't look "right."
If the seller can get someone involved with Carl's factory from "the old days" to authenticate it - in writing, all well and good. Otherwise, while its an "interesting" item, to my mind, that's about it.