In many cases, the way a Parker left the "dusty little plant down in Meriden" is a matter of record and available in the form of a research letter from the Parker Gun Collector's Association. Such things as stock dimensions, barrel length, chamber length, pellet count per barrel in a 30" circle (those things that are usually the victims of modification)are often available in the letter. A subsequent owner or prospective buyer has this information available to him either before the sale or after. In either case, that's how anyone would ever know. And these things are the cause of reduced value of an otherwise "untouched" Parker.