The devil is in the details. To be exact note the top edges of Model are gone, the middle of Winchester is gone, the AUG is almost gone. The other barrel text is worse. Also the barrel flats just look rough and the text on the barrels that should read Winchester proof steel has been so polished or buffed it is almost all gone.
So what you have is a refinished gun that is a decent shooter. It must have been fairly pitted to need that much polishing unless it was done by a complete idiot. The barrels should be fine, most 21's were built like Russian T34 tank drivers, heavy, stout, large mustache, short, big hips. The male drivers were not so heavily mustachioed. That was according to my late uncle, a tanker who thought Patten was the best general ever.
It never left Winchester looking like that. If it goes for a decent price someone will be very happy until he shows a Winchester collector his "mint, low serial number gun". If he pays north of what it is worth I hope he just enjoys the heck out of it and does not learn the difference.
Proper barrels should look more like these.