According to the "History" section of this site, my Super, who's VIN begins with "11220..." would, in fact, be a 1972 model year car and not 1973 as it says on the title. Frankly, most everything about the car hints to it having been a '72... the oil bath air cleaner rather than paper ellement filter; the window wiper switch being on the "tree" and not on the dash (post dating it 1972 and onward); the flat windshield / dash as per early Supers and all Standards, post 1958 style; smaller, iron-shaped "Hella" tail lenses, etc etc.
How could the year have been mistaken on the title? Is this common with older cars? I had supposed, originally, that perhaps the car had simply been built / released late enough in the '72 year / early enough in the '73 year that it was sold as a 1973... though Gunter is clearly not so. Hmmm. V. v. thought provoking.