Vacbear, the U4002 in grey was a commercial option although I always though the Senior was of commercial quality anyway and certainly have seen a good deal of domestic models purchased for commercial use. I am fairly sure it was originally available before the standard Ranger took over sales from the 652. The consumer had the choice of buying a grey model with shake out bag or standard paper bag, which made it identical to the domestic U4002 except for headlamp, although the original mains lead on the commercial model was a good deal longer. Like yours in the picture here, it uses the standard curved Hoover handle, although I am intrigued by yours as it has the metal flex hooks still. It must have been one of the very first.